Owner reviews for engine oil

I run Red Line oils in my H-Ds and Indian.

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

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.

I run amsoil. They have specific oil for all 3 holes. Seems to quiet down transmission and primary on my 01 road king

Mobil1

Onto my third or fourth big bottle of Mannol in a Toyota 2.2d4d and it has never missed a beat.

I run Amsoil signature with an amsoil or wix filter, I usually only do 3k intervals to keep the 257 happy though lol.

One step above “full synthetic” is “100% synthetic” from Amsoil. Switched years ago, car has a 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.

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.