We've used Shell 87 99.9% of the time since new and we are just under 55,000 miles with no issues. I have filled up with 93 octane a couple times and noticed no difference at all.
Our 05 Silverado has 117,000 miles and I've noticed that it 'pings' at high RPMs on 87 but doesn't on 89 or 93. So I've moved up to 89 on it which runs about $2-$3 more per fill-up.
Our 05 Silverado has 117,000 miles and I've noticed that it 'pings' at high RPMs on 87 but doesn't on 89 or 93. So I've moved up to 89 on it which runs about $2-$3 more per fill-up.
