I see lucas makes a Jr. Dragster oil 5w-20. Then there is Thor racing oils. Royal purple xpr 5w-30. What is everyone running in their high RPM engines?
Thor is pag based and primarily for karts where it is changed often. I use valvoline vr1 regular for run in then synthetic after it is broken in. My minis sit for long periods of time so I need something to protect the insides during periods of sitting in a shed. My dragbikes turn around 7500 max and I’m using 10w 30 vr1.
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