ssp@dutoit.UUCP (02/25/86)
Does anyone know where I can obtain 98 octane LEADED gasoline?
The problem is that I have a European specification car with the following
engine:
capacity: 1781cc
stroke: 86.4mm
bore: 81mm
compression: 10.0
which produces 82kw at 5500rpm and 157Nm at 3100rpm. According to the book,
it requires 98 RON (Research Octane Number indicating anti knock properties
of the petrol) Premium petrol. What car is it?
The car has been modified slightly to meet the DOT safety requirements but
*NOT* the EPA emissions (since I was immigrating at the time), so the
engine is unchanged (no catalytic converter etc.).
Three "solutions" have been suggested to me:-
1) Mix regular leaded and super unleaded in egual proportions.
2) Use octane boosters.
3) Use racing (114 octane) fuel!
Any suggestions as to which is the best &/or the most cost-effective solution?
Shamim Pirzada AT&T Bell Labs
research!ssp
(201) 582 5354jin@hropus.UUCP (Jear Bear) (02/26/86)
I wouldn't worry about the octane. The "Anti-knock Index" is defined as (R+M)/2 where R is your research index and M is the Motor index which is usually several points lower for the same batch of 'olean. I suspect that a mixture of unleaded premium and leaded regular, or even just the regular will work. -- Jerry Natowitz ihnp4!houxm!hropus!jin The Master Baker
carr@convex.UUCP (02/28/86)
>Does anyone know where I can obtain 98 octane LEADED gasoline? >Any suggestions as to which is the best &/or the most cost-effective solution? Just go to the nearest general aviation airport and ask for 100 octane (the GREEN STUFF). If they don't have any, ask for 100LL (Low Lead) , the BLUE stuff. Cost is between $1.75 - $2.00 / gal. This should fix you up! Rob Carruthers@Convex
aptr@ur-tut.UUCP (The Wumpus) (03/03/86)
> > > >Does anyone know where I can obtain 98 octane LEADED gasoline? > > >Any suggestions as to which is the best &/or the most cost-effective solution? > > Just go to the nearest general aviation airport and ask for 100 octane (the > GREEN STUFF). If they don't have any, ask for 100LL (Low Lead) , the BLUE > stuff. Cost is between $1.75 - $2.00 / gal. This should fix you up! Having a '65 Volvo 122 with a B18 engine makes me familar with the problem of finding high octane fuel. One of the first things to be considered is that during the '70's the rating system was changed. The new rating system is about 5 less then the old system (ie. 98 old = 93 new). If your car should still need high octane, I suggest using an octane booster. It should be avalable at almost any auto parts store. I would also suggest using unleaded gas. It is possible that you really don't need the lead in the gas for your car to work right. The only problem with running unlead gas is that the lead in the gas is often used as a lubricant, but it is only has a little effect. I am currently running my 122 on unlead super octane fuel. I would also suggest using Sunoco Ultra (that's the stuff I use) because it has the highest octane rating of any major brand (93.5). You should also be sure that you really need high octane. High octane has very little preformance value to a carburated car as long as the car is getting enough octane. (ie. if your car runs well with regular, then putting in ultra won't mean a hill of beans.) The symptoms of octane starvation are: Pinging during acceleration (this may also be caused by ignition prblm.) Power fade (may also be caused by engine problems, ie broken seal) Dieseling (running on after turning of engine) I hope you find the problem. The Wumpus D low