Re: [DML] Accumalator

["B Benson" <delornut@xxxx>]

If an engine is designed to use 86 octane that's what you should use. Higher
octane fuels are blended to combust at a slower pace while lower octane
fuels burn much faster. This is opposite of what many may think. If you use
the higher octane fuel the slower combustion can, over a long period of
time, produce carbon deposits in the combustion chamber which raise the
compression ratio. Higher compression ratios require higher octane, slower
burning fuels. Therefore it's possible that your car can develop a
dependency for high octane at some point. The slow burn of high octanes is
necessary for turbo cars because the slower burn helps retard detonation
which is when combustion takes place too early and catches the piston still
trying to finish the compression cycle while the combustion is trying to
drive it back down. The higher intake temperatures that come with turbo
charging create that situation. The bottom line is you're wasting money
using higher octane fuel if your engine wasn't designed for it.

Bruce Benson

> So, for all you guys in US - the DeLorean engine is rated for 86 octane
gas
> and it really doesn't do much good to use the more expensive premium
(well,
> maybe for the owner of the gas station it does). It's just more expensive.
> On the other hand, if your car seems to run bad on the 87 octane gas it
> means that it might need a tune-up because there is something wrong going
> on.
> I always use 87 gas in my D and it always starts at the touch of the key
and
> runs beautifully.
>
>
> Take care everyone!
> Tom Niemczewski