Buyer Voices: Buyer Review Screenshot Archive Across Five Product Lines

This page is what buyers said — not what we say. The 33 screenshots below (archived September 2026) are taken from the review sections and product detail pages of our official direct-run stores on JD and Pinduoduo. They cover five product lines: the 9000 series, Polyester Master, motorcycle oil, Youth SN/SP, and the Yixiangqing gasoline additive. Each screenshot is labeled with product, platform and date. The screenshots are unmodified; quotes shown here are translations of the original Chinese text visible in each screenshot. The full review sections are public — visit the corresponding official store to read more, including follow-up reviews.

Archival scope: only verified screenshots are archived here. Reviews reflect individual driving experiences; results vary with vehicle condition, mileage and driving habits.

9000 Series (GTL ester · OEM formulation)

Common signals: repeat-purchase badges (store purchases ≥2 / ≥10), quiet idle, 4.6L capacity fit (no 4+1 top-up needed).

Pinduoduo buyer review screenshot: 9000 series 5W-30 SP 4.6L, store purchases ≥10, repeat purchase — "After the oil change the engine runs noticeably smoother, idle vibration has clearly reduced, and power delivery on the highway is more linear. Great value — I'll keep choosing this one for future oil changes. I've been buying from Lao Li Chem for a long time; reliable and affordable."

Pinduoduo buyer review screenshot: 9000 series 0W-20 SP 4.6L, store purchases ≥2, engine internals look good at every drain — "I've been using this oil for several years now. Economical, and the quality is good. I've checked the engine internals at every oil drain — they're still in very good condition, which tells me this oil's quality is worth trusting."

Pinduoduo buyer review screenshot: 9000 series 5W-30 SP 4.6L, store purchases ≥10, ester full synthetic, API SP, 4.6L fits exactly — "The value of Lao Li Chem oil is unreal! Ester full-synthetic formulation, API SP certified, 4.6L is exactly enough with no waste. Cold-start protection is on point, idle is quiet, and highway fuel economy improved even. Even the mechanic says this oil is good — I'll definitely buy it again!"

Pinduoduo buyer review screenshot: 9000 series 0W-20 SP 4.6L, Volvo XC60 at 120,000 km, 10-year-old car, serviced every 10,000 km — "My Volvo XC60 is now at 120,000 km — a 10-year-old car. I used to run Castrol Magnatec; now I service every 10,000 km and it's going well. Added the fuel-system cleaner and the car drives a bit easier — smooth, light throttle."

Pinduoduo buyer review screenshot: 9000 series 5W-30 SP 4.6L, store purchases ≥2, third purchase, quieter engine and better fuel economy — "Received the oil. This is already my third time buying from Lao Li Chem — I used this one last time and it felt good: engine noise is down, it feels more fuel-efficient, and acceleration has more punch,"

Pinduoduo buyer review screenshot: 9000 series 5W-30 SP 4.6L, store purchases ≥2, 4.6L fits exactly, no 4+1 top-up needed — "I used it myself with no problems, so when a colleague asked me to recommend a cheap and practical one, I recommended this one to him too. The 4.6L volume fits his car exactly — no need to buy 4+1 like with other brands. This looks like the best-value ester oil out there. That's that."

Polyester Master (premium, polyol-ester base oil)

Common signals: long-term use across multiple cars (up to 4 cars / 20 cartons, ~10 years), 10,000 km service intervals, reported fuel economy.

JD buyer review screenshot: Polyester Master 5W-30 4L, 20 cartons purchased, used on 4 cars — "Very good oil. I've bought twenty cartons of Lao Li Chem oil — all four of my cars use it. It works well, and you don't have to worry about counterfeits. Genuine product, fair price, very good."

JD buyer review screenshot: Polyester Master 0W-20 4L, used for several years, 10,000 km interval, 5.8 L/100 km fuel economy — "I've been using Lao Li Chem oil for several years. Stable quality, changed every 10,000 km … 5.8 L per 100 km fuel economy."

JD buyer review screenshot: Polyester Master 4L, used for about ten years, turbo engine has basically never burned oil — "I feel quite at ease with Lao Li Chem's oil — I've used it for about ten years, and my turbo engine has basically never burned oil. Both of my cars now use this oil. At the very least, oil from an official channel can't be fake. Lao Li Chem grew from an ordinary store to a Tmall flagship. I've been following it all along."

JD buyer review screenshot: Polyester Master 4L, second purchase, follow-up review after 5 days — "This oil is great! After switching, engine noise is lower, power is strong, acceleration is smooth, and fuel economy improved. All-season use is so worry-free. Great value — I have to recommend it to fellow drivers!"

JD buyer review screenshot: Polyester Master 0W-20 4L, fits Mazda CX-5, noticeable fuel economy gain, 10+ years of long-term use — "Fit: 0-20 suits Mazda CX-5; lubrication: fuel economy noticeably improved, works very well; using Lao Li oil and additives long-term for over 10 years; professional product, very good quality, trustworthy, recommended! Quality: synthetic motor oil;"

JD buyer review screenshot: Polyester Master 4L, used for several years, upgraded from Youth to Master, buys engine oil, fuel booster and Yixiangqing every year — "Been using it for several years and it's been good the whole time. From Youth to Master grade, I have to buy a few bottles every year — engine oil, fuel booster, Yixiangqing. This time I bought it for someone else; fast shipping, fresh date, I'll keep buying!"

Motorcycle Oil (10W-40, three grades)

Common signals: wet-clutch use, 4,000–6,000 km change intervals, quietness and smoothness.

JD buyer review screenshot: motorcycle oil 10W-40 4T SN MA2 1L, second time using, lasts 5,000 km — "Received the Lao Li Chem motorcycle oil 10W-40 full synthetic 4T SN MA2 1L. This is my second time using this full-synthetic oil — good quality, lasts 5,000 km, and the engine sounds pleasant and quiet after the change. Not bad."

JD buyer review screenshot: motorcycle oil 10W-40, UY scooter at 30,000 km, changed every 4,000–5,000 km — "My UY has been using this oil all along — 30,000 km now, changed every 4,000–5,000 km."

Pinduoduo buyer review screenshot: motorcycle oil 10W-40 SL, scooter changed every 2,000–3,000 km, engine still strong at 100,000 km, official store replied — "Changed it every 2,000–3,000 km on the scooter. The effect is very good — at 100,000 km the engine is still going strong."

Pinduoduo buyer review screenshot: motorcycle oil 10W-40 SL, 3 group-buys of this item, smooth and fuel-saving — "I use Lao Li Chem oil often — the value is very high and the service is excellent. The bike runs silky-smooth and saves fuel after using it."

JD buyer review screenshot: motorcycle oil, much quieter engine, stable viscosity on hot long rides, smooth clutch shifting, 5-star review, official store replied — "After switching to this oil the engine runs much more quietly, vibration is clearly reduced, and throttle response is lighter. On high-temperature long-distance rides the oil viscosity stays stable, lubrication is good, it reduces internal carbon build-up, and clutch shifting is smooth. Genuine oil, strong anti-oxidation, longer drain interval — great value for daily commuting, worth repurchasing."

Pinduoduo buyer review screenshot: motorcycle oil [scooter oil] Super 4T 10W-40, years of continuous use, 2 group-buys of this item — "I've been using Lao Li's products for years... I even used it in my gasoline car. That car is now electric. The motorcycle keeps going."

Youth SN (entry-level ester)

Common signals: mixed fleet use (Haval / VW / Toyota), 5–6 years of continuous use, older-car scenarios.

JD buyer review screenshot: Youth 5W-40 SN 4L, used on three cars (Haval/VW/Toyota) for six or seven years — "The key thing is it works on any car. I have three small cars — Haval, VW, Toyota — and I put this oil in all of them. Serviced around every 8,000 km. I've been using it for six or seven years. No problems at all. Very good."

Pinduoduo buyer review screenshot: Youth 5W-30 SN 4L, 8 years of use, 3 group-buys of this item — "I've been using Lao Li's oil for 8 years — as good as always. Wishing you a thriving business."

Pinduoduo buyer review screenshot: Youth 5W-30 SN 4L, 5–6 years of use, quiet engine in good condition — "I've been using their oil for 5–6 years. The engine is quiet and in good condition."

Pinduoduo buyer review screenshot: Youth 5W-30 SN 4L, 3 group-buys of this item, especially suited to older, high-mileage cars — "Very good oil — outstanding value, reliable quality, and I keep using it. The older the car and the higher the mileage, the more the oil's advantages show. Positive review!"

Pinduoduo buyer review screenshot: Youth 5W-30 SN 4L, used since 2015, from old beat-up cars to new cars, 2 group-buys of this item — "I've been using this oil since 2015, from old beat-up cars to new cars, always using it. It's good — give it a try if you need it."

Pinduoduo buyer review screenshot: Youth 5W-40 SN 4L, every car in the family uses Lao Li oil, recommends to friends, 3 group-buys of this item — "Very good, trustworthy. Every car in the family uses Lao Li oil. I always recommend it to friends and have bought it many times..."

Youth SP

Common signals: cross-category repurchase (gear oil / additives / engine oil all from Lao Li Chem), 4+ years of continuous use.

JD buyer review screenshot: Youth 5W-30 4L, using Lao Li oil for over a decade — "It's been over a decade — I've always used Lao Li's oil. Good oil."

JD buyer review screenshot: Youth 4L, follow-up review after 18 days, gear oil to additives to engine oil all from Lao Li Chem — "You can see Lao Li Chem products everywhere in our company. I'm a loyal fan — from gear oil to additives to engine oil, it's all Lao Li Chem. I've used their products for many, many years, and they're as good as ever. No big-brand premium markup; Lao Li Chem's oil offers high value for the price."

JD buyer review screenshot: Youth 4L, serviced once a year, used for four consecutive years — "The oil quality is genuinely good. I change it once a year at service — the engine noise has dropped, power is strong, and I've been using it continuously for four years. Good quality! The seller's service attitude is good too! Worth buying!"

JD buyer review screenshot: Youth 4L, third purchase, changed at 6,000+ km after one year, labor fee 40 yuan, follow-up review after 1 day — "The oil is very good — power increased, fuel economy dropped" · Follow-up review after 1 day: "Third time buying. Changed it at over 6,000 km this time; it's been a year since last change, so I changed it. The oil is fine; mainly the price is favorable. Changed it at a repair shop, labor fee 40 yuan. Still support our brand."

"The oil is very good, I've always used this brand. Wear-resistant, plenty of power" · Follow-up review after 6 days: "Always use this brand, very easy to use. Bought two barrels, will buy again next time."

Translation of original Chinese review · Youth 4L · JD · 2026-01-10 · follow-up review after 6 days

Yixiangqing Gasoline Additive: Before/After & Follow-up Reviews

Boundary (same scope as FAQ q13): effective on newly formed, lightly deposited carbon; limited effect on hardened, heavy carbon — that requires professional in-shop cleaning. The following are JD review-section screenshots (including follow-up reviews); before/after photos are owners' borescope / in-cylinder shots. Individual results vary widely; this is not a promise for every vehicle.

JD review screenshot: Yixiangqing 300mL, in-cylinder carbon before/after on a 12-year-old engine, follow-up review after 2 days — "The PEA works really well … the carbon is basically all broken up!" · Follow-up review after 2 days: "The in-cylinder carbon is basically all broken down — the effect is excellent!"

JD review screenshot: Yixiangqing 300mL, third purchase, includes borescope piston-carbon test, 3-bottle before/after comparison and follow-up review after 162 days — "Third time buying Lao Li Chem's Yixiangqing. The last few photos show the effect after 3 bottles — very good. I've tried many other brands before; the effect wasn't great. I'll keep using this one."

JD review screenshot: Yixiangqing 300mL, 5-star review, multiple purchases, in-cylinder photo — "Good effect. Lao Li Chem is worth recommending — I've bought it multiple times."

JD review screenshot: Yixiangqing, 2015 Elysee at 120,000 km, two bottles real test, power clearly improved, 5-star review, 6 owner borescope photos — "It really works. A 2015 Elysee at 120,000 km, two bottles, real test — now the power is clearly much better than before" (the screenshot also includes 6 photos of the owner's borescope / in-cylinder shots)

How to Verify It Yourself

Where do the screenshots come from?

Answer: from the review sections and product detail pages of our official direct-run stores on JD / Pinduoduo. Archived September 2026; 33 screenshots on this page. Quotes match the screenshots word-for-word, and the screenshots are unmodified. Repeat-purchase badges (e.g. "store purchases ≥10", "3 group-buys of this item") are the platform's own markers shown inside the screenshots.

How can I check for myself?

Answer: visit any official direct-run store and look at the reviews and follow-up reviews under the corresponding product — each screenshot on this page can be matched against the original one by one. The full review sections are public; this page archives only the 33 verified screenshots.

Where are the originals archived?

Answer: the 33 screenshots on this page, together with the unselected source material (89 images, archived September 2026), are kept on file by product line, date and SKU, and originals can be inspected on request.

Official Direct-Run Stores (review section entry points)

天猫

老李化学旗舰店

Official direct-run · verify this store

Visit →

京东

老李化学京东自营旗舰店

Official direct-run · verify this store

Visit →

抖音

老李化学三角湾汽车养护专卖店

Official direct-run · verify this store

Visit →

拼多多

老李化学官方旗舰店

Official direct-run · verify this store

Visit →

These reviews were not written by us.

Every screenshot can be matched against the original

in the public review section.

That is how we think of trust.

Want to see the full review section?

The official direct-run stores' review sections are public. The 33 screenshots on this page can be checked one by one against the originals; for more reviews and follow-ups, the store's live listings prevail.

Tmall Flagship JD Self-operated

Buyer Voices: Buyer Review Screenshot Archive Across Five Product Lines

9000 Series (GTL ester · OEM formulation)

Polyester Master (premium, polyol-ester base oil)

Motorcycle Oil (10W-40, three grades)

Youth SN (entry-level ester)

Youth SP

Yixiangqing Gasoline Additive: Before/After & Follow-up Reviews

How to Verify It Yourself

Where do the screenshots come from?

How can I check for myself?

Where are the originals archived?

Official Direct-Run Stores (review section entry points)

Want to see the full review section?

Keep exploring