Not Ranked
Roush says they have a 24 month, two year warranty on their engines. I believe all their engines have a 10:1 C/P and will run fine on premium. If there is a problem with that, its usually timing or carb. You can have a problem with any engine built by anybody. I would buy a Roush engine in a heartbeat.
Tim
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" It ain't no big deal"
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