I run Red Line oils in my H-Ds and Indian.
Owner reviews for engine oil
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Ams oil, yes it's overpriced but it is the best and going from stock HD fluids in the primary and tranny it does shift noticeably quieter and it's much easier to find neutral
Pros: shifts quieter, easier neutral
Cons: overpriced
I use Amsoil for all 3 and ride a 2008 H-D Softail Crossbones
I use [this for crankcase oil](https://www.amsoil.com/p/amsoil-20w-50-synthetic-v-twin-oil-change-kit--4-quarts-with-chrome-filter-hdck/) - now 4quarts = 1 gallon so there's a bit extra in this but it also comes with an oil filter.
Pros: fully synthetic, holds up better
Cons: expensive
I run amsoil. They have specific oil for all 3 holes. Seems to quiet down transmission and primary on my 01 road king
Pros: quieter transmission and primary
Mobil1
Onto my third or fourth big bottle of Mannol in a Toyota 2.2d4d and it has never missed a beat.
Pros: never missed a beat
Vehicle:
Toyota
I run Amsoil signature with an amsoil or wix filter, I usually only do 3k intervals to keep the 257 happy though lol.
Pros: keep the 257 happy
Mileage: 3000 km
One step above “full synthetic” is “100% synthetic” from Amsoil. Switched years ago, car has a subtle purr.
Pros: subtle purr
I run Shell Rotella T6 5/40 I live in Florida. Slightly high copper on the STI. The Tribeca is fine and purrs like a kitten.
Pros: Tribeca purrs like kitten
Cons: high copper on STI
Vehicle:
Subaru
Fellas, Don't bother running Mobil1 for extended period of time. I have done 2 consecutive oil tests on Mobil1 0W-40. One with 6200 miles and the other was at 4700 miles. Used OEM filters in both cases. Results: With the 6200 mile drain interval, the iron and the lead levels were up there through the roof! With the 4700 mile drain interval, the iron was within average and the lead was couple of points above the average.
Pros: iron within average
Cons: high iron and lead
Mileage: 6200 km
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