MS 109 vs C16 - Page 4 - 6SpeedOnline - Porsche Forum and Luxury Car Resource

robmd99 · 2008-09-12 04:31:29

Todd likes Sunoco GT Plus with a stock fuel system, it is a denser fuel & 104 oct.I thought ms 109 was 103 oct? No, that's MS103. Specification Sheet: VP MS 103 Specific Gravity: .743 @ 60?F Lead: None Color: Red Oxygenated: Yes Motor Octane: 99 R+M/2: 103 Research Octane: 107 RVP: 2.86 Oxygen Stability (min.): 1440+ Distillation: 10% evap @ 190.0?F 50% evap @ 210.4?F 90% evap @ 217.1?F E.P. @ 225.7?F Production: Elmendorf, Texas USA Availability: Sealed Drums

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09-19-2008, 10:09 AM

TiALSport

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Quote:

Originally Posted by Cpais

I guess it's a good thing that I use HKS wastegates because if I have to worry about leaded fuel corroding my wastegate parts then I am in big trouble. Leaded fuel was always known to be better for the valves and valve seats back in the day and that was one of the disadvantages of using unleaded fuel when they made the switch, now it's the opposite?

we've found that if you use leaded ALL the time and drive frequently the effects on the non leaded valve are minimal and really doesn't do much. now if you drive occasionally and use leaded fuel with the non leaded valve that is where you are going to run into issues.

all of that is now irrelevant info now because all 38's come with the leaded safe valve

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