Meth is annoying I ran it in my gto. If you have access to easy e85 get aux and a drop in and just run full e85. The s280 seems to be a bit bigger then the vt330 and will run out of fuel faster on ethanol. I run 5w-30 with my hybrid now.
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the VT330R is better matched with the S270 Turbo Technics
Both use a larger aftermarket compressor housing but still utilize the stock exhaust housing
The S280 has a bespoke larger cast exhaust housing in addition to the larger compressor parts that make it a step above any turbo with stock parts.
The S280 will make over 300whp on 93 octane
There is no other turbo with the stock compressor cover or exhaust housing that can match that.