THE RON(g) CHOICE??

[Russ]

So, Shell have had there Optimax on the market for a few months, and you lot seem to love it? BUT ! BP now have there new Ultimate out, i was wondering who's used it, and how it compares to Optimax?

[Shad]

Neither, cheapest going will do me. £45 a tank is already enough to be spending.

[XTR]

Originally posted by Shad
Neither, cheapest going will do me. £45 a tank is already enough to be spending.

same here


full tank is about £39 for me. 60 litre tank

[Lowe]

Optimax is still the better fuel. Why?

1) It's cheaper. Optimax is 79.9 where I am, Ultimate is 83.9
2) Optimax RON is higher. Optimax = >98, Ultimate = 97.
3) The MON of Optimax is very slightly higher on average.

Both fuels do the same with regards to cleaning the engine and help on emmissions.

The one good thing for Ultimate is that it's given me an alternative fuel should I be caught short of a Shell station, but it's still too blummin expensive when Optimax is so (comparatively) cheap.

[Russ]

btw lowe mate, what side of walsall do u live? the 1 closer to wolves or not? :E

[Lowe]

Err, not that close to Wolves. Closer to Walsall.. I'm not that far out the town centre..

[Russ]

ah ok, i aint stalkin you or nowt

[Punky]

optimax! i use it in my, ahem, scooter and it makes it go quite a bit faster.

/sits back and waits for the scooter mockery

[Shad]

Originally posted by Punky
optimax! i use it in my, ahem, scooter and it makes it go quite a bit faster.

/sits back and waits for the scooter mockery

Hope you're not one of these muppets that come down the middle of queues of traffic and sit at the front thus preventing me from out accelerating the guy next to me cos I'm in the wrong lane

Seriously tho, scooter riders can be absolute w****rs. Sitting up my arse, looking at going around the outside on 30 mph roads. If there's one behind me I generally do everything as is reasonably safe to get in their way.

[Trash Man]

Been using Optimax for about 3 months now, it's 82.6p a litre here, compared to 76.9 for normal unleaded. So really it ain't that much more a tank, costs me about and extra £4 on a full tank in my Audi than normal unleaded.

Can't say I have noticed a great difference in performance, but it is a better fuel and supposed to be better for the engine, so that's good enough for me.

[hotpurple]

I just use normal petrol as my engine doesn't have a knock sensor so it is actually slower with optimax than unleaded, and I can't be arsed to adjust the ignition timing back to 4 star settings.

Have used optimax in the past though and the car is very smooth on it, and at 98 RON it should be better than the 97RON ultimate by allowing more ignition advance.

Chris

[Lowe]

Originally posted by hotpurple
and at 98 RON it should be better than the 97RON ultimate by allowing more ignition advance.

Not strictly true.

RON is measured at about 500 RPM, or an engine's idling speed, MON is measured under high RPM and load. So, it's the MON rating which is important and lets you play around with advance since you're unlikely to get pinking at idle.

The difference between the two fuels MON rating is very, very small. Hence why I can use it even at 17psi boost and not pink my boobies off.