With Red Line you really have to look beyond the grade on the bottle. They will always recommend the thinnest kinematic viscosity oil because they have such a high HTHS.
Pros: high HTHS
Reviews of RED LINE engine oil
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Redline appears to be more interested in using the best additive package to make the best oil, not having to use pre-tested additive packages that may be geared more toward fuel economy.
Pros: best additive package
Cons: not API-approved
The zinc and phosphorus levels (ZDDP) is much higher in the redline. Iron per 1000 miles is much better. Viscosity retention and flashpoint are much better also.
Pros: higher ZDDP, better viscosity
I love red line, search for my UOAs... i've tried most of the top teir vw502 approved oils in the FSI (Motul xcess, motul specific, total energy), and they don't even come close to touching red line with regards to longevity / performance.
Pros: longevity, performance
Vehicle:
Volkswagen
I tried the redline 5w30 previously which has very high levels of moly (>800ppm) and the results were not as good as the moly-less 5w40.
Pros: high levels of moly
Cons: results were not good
4 qts Redline 5w40, 1 qt Redline w40 Race Redline blows away the competition... Lumps of ZDDP and Moly with the Race oil mix, fuel dilution pretty much disappeared, and viscosity/flashpoint are well within reason.
Pros: fuel dilution disappeared
I would stick with a tested oil like Red Line 5w-40 or GC, but that's me.
Pros: tested oil
Sticking with a single weight is a better idea than mixology IMO..
Pros: single weight better
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
I have been running redline 5W40 since 5k miles in my 08 GTI and I noticed an immediate improvement in turbo spool up. Others have noticed this improvement on other turbo cars as well.
Pros: improvement in turbo spool
Vehicle:
Volkswagen
Mileage: 5000 km
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