Engine oil VALVOLINE or RED LINE
I run valvoline motorcycle 20w50 in the primary and crankcase and valvoline 75w140 diff in the trans.
I use Redline but it’s about the same price if not moreso.
I use Valvoline 20W 50 VR1 racing oil. It’s got a high magnesium content so well suited for the gearbox.
If you want brand recommendation choose Valvoline Extended Protection 5w-20 every 4k miles.
I use Redline 10w60.
Cummins uses Valvoline premium blue.
Similar with my Audi but with Valvoline.
This weekend, the oil that's in it is coming out (it's clean) and Valvoline Restore and Protect is going in. Rationale is there will undoubtedly be deposits on the pistons, in the piston ring grooves and ring lands.
I’ve been using redline in my 2020 fxlrs for the last 3 years. A few guys I know swear by it.
So far redline 20w60 is doing great in the summer heat
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