I use Redline, similar quality and price to Amsoil, without the MLM BS.
Pros: similar quality, good price
Reviews of RED LINE parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
4.4
Manufacturer Ranking
#21
125
Spare Parts
6
Country
USA
Spare Parts
Comparisons
I recently replaced my front and rear differential oil with Redline 75W85 full synthetic.
Vehicle:
Toyota Highlander
Part number: 50104
I've used Redline 75w85 which has the Toyota spec listed on the bottle. Have also used ENEOS 75w90 without any issues.
Pros: no issues
Under hard driving conditions per the manual reduction gear oil should be changed not just inspected. Almost all off us fall under hard driving. Search around some people have gotten better range out of higher quality gear oil redline I think.
Pros: better range
Vehicle:
Nissan Leaf
In my experience of trying many different oils, what I think are the best, as far as the engine running cool and smooth shifting are: 1. Redline 15w50
Pros: engine running cool
Red Line Racing Two Stroke is the best oil I've run. It leaves a good film and smells the nicest.
Pros: good film, smells nice
It's hard to find GL4 gear oil anymore. The only real GL4 available in the States seems to be Redline. GL5 oils are generally harsher on brass synchros. I've been using Redline since 2007, when I bought my GTI, and it shifts just as well as it did back then.
Pros: shifts just as well
Cons: hard to find
Vehicle:
Volkswagen
Redline SI-1 is highly regarded for its high PEA content for carbon cleaning.
Pros: high PEA content
I just put Redline 5w-30 into my 2011 STI at the last oil change. We'll see how it goes.
Vehicle:
Subaru
Engine was noisier with the mix vs. the previously used redline 5w40. Iron levels are up at 6.3 ppm/1000 miles Oil usage increased by 1/2 quart over the redline 5w40 TBN/TAN levels are worse than 5w40 at comparable mileage
Cons: Engine was noisier, iron levels up
Mileage: 5000 km
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