Gasoline

DJ · Post by DJ » Sun May 31, 2009 5:42 pm

Would there be any advantages or disadvantages in using the higher octane gas in a stock 230 ?

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Lifer · Post by **Lifer** » Mon Jun 01, 2009 4:19 am

There's no real advantage of higher octane gas in a T245 engine. The higher octane ratings came along as compression ratios increased, and a high-compression engine usually runs poorly with lower octane gas. The engines in our trucks have a much lower compression ratio than , say, the '60s-era "muscle cars." My brother would run nothing less than 100 octane in his Dodge Charger back "in the day." You can't even get that stuff now!

refit1701 · Post by **refit1701** » Mon Jun 01, 2009 7:10 am

What Lifer says is true, but I have seen a trend lately of buying a couple of gallons of aviation gas for use while the trucks are in storage. It contains no system rotting ethanol and does have lead in it.

I wouldn't run it full time, but as a treatment before winter storage, some say it is a good thing. I have not personally tried it.

djester · Post by **djester** » Mon Jun 01, 2009 6:24 pm

I use 100LL avgas in my M37, M151, golf cart and lawn mower, with no bad results -- other than the expense. None but the lawn mower get used much, and the vehicles can sit all winter in my hanger, without fear of the fuel going stale.

Nickathome · Post by **Nickathome** » Wed Jun 03, 2009 8:21 am

Lifer wrote:There's no real advantage of higher octane gas in a T245 engine. The higher octane ratings came along as compression ratios increased, and a high-compression engine usually runs poorly with lower octane gas. The engines in our trucks have a much lower compression ratio than , say, the '60s-era "muscle cars." My brother would run nothing less than 100 octane in his Dodge Charger back "in the day." You can't even get that stuff now!

Lifer I beg to differ, as a few of our local Sunoco stations were selling what they termed "racing fuel". This was within the last couple years. It was up around 100 octane, and was pretty expensive. Not sure if they are still selling it though.

k8icu · Post by **k8icu** » Wed Jun 03, 2009 9:07 am

I can't say much about the M37 motor as mine never ran and I'm going in a different direction, but I know my old VW as well as my M151 the higher octain made them run better.