Vivvo CMS v4.7 Columbuzz Indiana http://www.columbuzz.net/ Columbuzz Indiana http://www.columbuzz.net/files.php?file= http://www.columbuzz.net/index.php/ Are you getting what you pay for at the pump? You shouldn't assume you are http://www.columbuzz.net/index.php/permalink/4234.html Opinion Mon, 09 Jul 2012 02:23:00 -0400 A. Simpson Opinion Mon, 09 Jul 2012 08:22:46 -0400 Note: compression ratio of an engine IS NOT changed by fouled plugs. It is constant, and unchanging. Compression ratio is a comparison of chamber volumes at high and low piston stroke, and can only be changed if the block , pistons, rods, cylinder head, or crankshaft are replaced with different sized ones. It is only determined at the time of engine assembly, and not affected by external factors such as fouled plugs.
You are correct that all gasolines at the pump are not necessarily the same, but don't convict, or place blame, with only the limited knowledge you have shown. Your issue, and "testing', contains numerous variables that can skew the results, rendering them inconclusive.]]> Ryan Opinion Mon, 09 Jul 2012 12:47:27 -0400 A. Simpson Opinion Mon, 09 Jul 2012 15:59:41 -0400 ...after about 3 or 4 fill ups (as your lifters become cleaned)...

Lifters do not come into contact with your fuel. They ride in a steady supply of oil.
Cleaner lifters may be obtained by some oil additives.
I think you may have meant valves.

And, you are correct with your view on octane rating. Higher octane fuel is more efficient than lower octanes, yet more expensive.]]> Angie Opinion Mon, 09 Jul 2012 18:10:06 -0400 Columbuzz Indiana