Mixing Fuel.??

[nick275uk]

I went to fill up a couple of days ago and my usual filling station (approx 800 yards away from my home(lucky me)) was out of Optimax.!!!

I drove around a bit and ended up at a service station selling what was advertised as "advanced fuel" - 77 RON.!!

I only half filled up, as I didn't need a full tank, and hoped to 'top' up with Optimax when my local station got a refill.

As I haven't done the mileage I expected, I still have about a quarter of a tank of the 77 RON "advanced" stuff in the tank, but I need to do a long(ish) journey tomorrow.!!

Is there a problem with mixing what's left of the "advanced" 77 RON stuff with Optimax at 78 RON.??

[jonnyb]

Err.... that should be 97 and 98 RON! And there is no problem mixing. If you have a 5.0 you MAY get a bit of pinking under heavy load, but with the small amount you have used it would be very unlikley. I know people that use 95 RON in 5.0 and have no problems, yet others pink like mad.

[raceboy]

Well as they've been making the cars for the last 10 years and Optimax is relatively new, I wouldn't worry one little bit about it

[nick275uk]

Doh.!! I know I shouldn't have written this query after a load of these

At least you knew what I meant and didn't take the proverbial.!!!

Cheers chaps.

As soon as the bloody sun comes out, I'll post some pics - she's a beauty.....(oh and one of those faster blue ones )

[Nick P]

I just chuck in any old juice and have never really noticed much difference to be honest

[jellison]

Unless the 77 is actually Diesel then should be not issues - Optimax every time or Q8 Super (98 as well) then down to the BP 97 Ron if I have to then the 95 normal stuff - will make the car pick up better and run cleaner - and not so likely to pink.