I have a 2004 Cobra with built stroker, atermarket cams, stock cylinder heads, and an aftermarket twin screw supercharger. The car is tuned for both pump gas and e85. It produces 700rwhp on e85@20psi and 618rwhp on 93 octane pump fuel at 17psi. I'm planning on turning up the boost on e85 or race gas to 25-26psi. At that boost level it will undoubtedly be approaching 800whp. Currently I have a K&N oil filter but regurlarly run M1 filters as well. I have M1 5w20 synthetic in the car now. I'm not sure it is the correct oil for my application. I used to run RP but I didn't notice any benefits over the M1 since I change the oil at 3k no matter what. I drive the car in the Texas heat everyday pretty much. The drives typically are from 10-45 minutes around the metroplex; sometimes in stop and go traffic. I drive it pretty hard. Do race oils provide better protection for as many miles as the standard M1 synthetic? I've been contemplating trying Reline or Amsoil but before I make a decision I'd like to read your inputs.
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