Jim says: > I'd >suggest backing down one grade from premium(R+M/2=92) and try a >midgrade(R+M/2=89). Listen closely for pinging under hard accelleration, >like up a hill. If you hear any, go back to premium. If not, thry the >regular(R+M/2=87) grade and listen for pinging again. This raises another question....the mid-grade and high-grade gasolines, i.e. R+M/2=89, 92 (at least here in Nebraska), are generally 10% ethanol. My owners manual says to steer clear of alcohol blends. Why? Pat ____________________________________ Patrick L. Larsen Water Center/Environmental Programs University of Nebraska pll@unlinfo.unl.edu http://www.uvm.edu/~plarsen/pat.html ____________________________________
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