Not Ranked
Hi!
I use 20W50 Valvoline VR1 Racing at my Roush 427R. I was talking with Dennis Olthoff when i was buying the car - he recommended 20W50 for normal use, Mobil 1 10W30 for racing. Mobil 1 is not available here so i am going with 20W50 since 4 years without issues.
Peter
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