Hey all, long time lurker, first time poster. I have an 03 Mitsubishi Evo 8 with a 4G63 based 2.3L Stroker built by RS Motors back in 2013. Car was ran on a 10W40 when originally built, believe it was Redline. Currently, the car has been on a diet of 20W50 VR1 in the summer and then Rotella T6 to clean in the cooler months before storage. Boost is upwards of 40+ on a Holset HX40 with a billet 60mm compressor from KTS, E85 fuel, makes somewhere in the area of 700whp. Revving the car to 8200. Eagle crank and rods, Wiseco HD pistons. Bearings are saying prayers for oil film for sure.
All of this being said: Should I continue running this car on VR1? Something better for the money? I change it fairly frequently due to fuel dilution, but hopefully once it gets fresh rings and bearings this winter, I can do slightly longer OCI's. Opinions/suggestions welcome. Considered something like a Euro 0W40 synthetic, but the lack of ZDDP compared to a race oil is worrisome on a journal bearing turbo with high thrust loads present, as well as the RPM involved. Aggressive cam profile on the Kelford 280's too.
All of this being said: Should I continue running this car on VR1? Something better for the money? I change it fairly frequently due to fuel dilution, but hopefully once it gets fresh rings and bearings this winter, I can do slightly longer OCI's. Opinions/suggestions welcome. Considered something like a Euro 0W40 synthetic, but the lack of ZDDP compared to a race oil is worrisome on a journal bearing turbo with high thrust loads present, as well as the RPM involved. Aggressive cam profile on the Kelford 280's too.