Haven't used my car much recently but when filling it up during the fuel problems I couldn't get Optimax so settled on a full tank of Tesco SUL and a bottle of booster (think it was millers) which said it added an extra 2-3 RON to the fuel.

Now if the Tesco SUL is 97 adding the booster should make it 99?

I can now get Optimax locally but its still £1 a litre. Haven't worked it out properly but I'm thinking it might be cheaper to fill it up with Tesco SUL and add the booster rather than fill it up with Optimax.

 

no there clames are way off sul 97 with a booster 97.2 tesco are testing there new 99 ron fuel around england but only about 100 stations have it but they are about to try out another 100 soon

 

yep, been using the 99ron stuff from Tesco, but it's same price as Optimax nr me. Tbh, I can't tell the difference or notice anything different.....

 

I filled up with the Tesco 99 stuff the other day. It was a lot cheaper than the closest Shell. Only done about 60 miles with it in, so can't properly comment on the econemy, but it seems to be heading in the right direction...

 

really, how much cheaper was it then? round my way both tesco 99ron and optimax are the same at 99.9p a litre.... altho, think if you spend £50 or more on their crap food you get 5p a litre off !

 

tesco 99 is starting to pop up in different stations now around basildon essex, its in laindon, pitsea soon so its starting to move around. I find its much better than optimax

 

To answer your question: 97 octane fuel plus a bottle of booster will take it up to 99 - 100 octane which is equivalant or greater then optimax and more then adequate. HTH

J