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My engine had started to knock a little during acceleration at 181k miles. I have a stick shift. I tried to switch gears at higher speeds but it was still there so I decided to do what I did in college with my 300k mile 1988 Honda Accord. I switched from 87 to 93 after emptying my whole tank.
The RAV knock is all gone. Very smooth quiet acceleration. Good 180 degree noticable difference.
Just wanted to share my experience for those who are in the same boat.
I have read all articles possible on octane usages for the last 100 years !!
Nowhere I saw it written down that switching old engine to a higher octane will take knocking away... (in those words) ..
With a big trip coming up this was a good relief.. phew !
The RAV knock is all gone. Very smooth quiet acceleration. Good 180 degree noticable difference.
Just wanted to share my experience for those who are in the same boat.
I have read all articles possible on octane usages for the last 100 years !!
Nowhere I saw it written down that switching old engine to a higher octane will take knocking away... (in those words) ..
With a big trip coming up this was a good relief.. phew !