Suitable petrol for Supra - poll and thoughts

[Supradude666]

its Optimax all the time baby yea well for my N/A supra and my dads Skyline atleast..

 

after using Optimax i wouldnt use anything less especially not in a supra.... uk spec or jap it dont matter....:flame Dev

[Guest 43troy]

Has anyone actually tested Optimax or seen a test review?

 

The only fairly accurate test I have performed is for MPG.

 

Filling up with Optimax eight times, I averaged 22.1mpg over a 2500 miles (approx) period.

 

Filling up with standard unleaded eight times, I averaged 23.0mpg, again over a 2500 miles (approx) period.

 

 

I didn't notice any increase in perfomance, only an increase in fuel costs!

[Guest Terry S]

I have spoken to one expert and one person who makes/cleans/tests fuels and injectors for a living. Both have said that optimax is better than normal SUL, BUT, that it has a very short shelf life. I was quoted 2 weeks, so assuming it's in the tanks a week that gives you a week to use it. One guy also said that every 10 fill ups you should run a tank of Texaco SUL as this has the most effective fuel system cleaning additive.

[Patrick_Devlin]

When I first started using Optimax I saw a slight increase in fuel economy and an increase in responsiveness and performance. Since then my fuel economy has decreased somewhat with the removal of the CATS and the fitting of a Hiper and a heavier right foot:)

[chuck_legend]

I have just bought myself my first supra. its a j-spec tt and i

have just been using normal petrol which i am guessing is taboo so think i will start using the optimax. have a shell at top of my road so its all good

[chuck_legend]

what effects will just using normal fuel have, just out of interest???

[Supradude666]

im no expert but AFAIK lower octane fuel burns at a lower temperature so an in an engine designed for 100 octane fuel it can cause premature detonation which isnt good.. uk(normal) fuel is lower octane about 95-97 octane fuel

 

but like i said im no expert its just wat ive read/ heard..

[toyotasuprauk]

Originally posted by 43troy

The only fairly accurate test I have performed is for MPG.

 

Filling up with Optimax eight times, I averaged 22.1mpg over a 2500 miles (approx) period.

 

Filling up with standard unleaded eight times, I averaged 23.0mpg, again over a 2500 miles (approx) period.

 

 

I didn't notice any increase in perfomance, only an increase in fuel costs!

 

Mines a NA so slightly different but I found it made no difference in performance to use optimax and it made the car less economical too.

[Supradude666]

Mines an N/A too but i did notice a slight increase in accleration the car felt more responsive with optimax in (well i thats how it felt)

but yea i agree not as economical i find i fill up more using optimax than say texaco super unleaded

 

 

 

(edited to correct rubbish late night spelling)

[Guest 93dawg]

I use 92 octane unleaded (that would be called our premium gas) here as that is the highest octane we can buy here in Washington State, USA in a gas station. Some states have 93 octane and some only have 91 octane.

 

We can buy racing fuel in 100 octane and 104 octane in unleaded from an oil compnay distributor if we want, but it costs a lot more money. There is one truck stop station, that is owned by the local Chevron (Standard Oil) distributor, in my little town of Longview, Wa that has 100 unleaded racing fuel at the pump.

[richy2jz-gte]

i gained 7bhp by using esso super unleaded over optimax in my audi quattro 1.8t running 1.2 bar

 

optimax=247bhp

 

esso super=254bhp

 

i noticed also that optimax has short hioctane life as i came home from a week on holiday started my mota up and it ran like a sack of crap till i put some fresh fuel in.

[apoc_reg]

ive got an NA with de cat etc but nothing to fancy.

Should i be using optimax???

 

Cheers

[Guest AJFleming]

Optimax, Ultimate or SUL.

 

Never super market or 95 ron.

 

Always in a turbo but not always a Supra

 

Ant.

[Bobbeh]

I read today in Jap Perfomance magazine, that they reckon BP Ultimate is 102 RON, I couldnt believe what I was seeing!

[Stu]

I also see that mate..haven't used it myself so couldn't comment..would like to know if it was better than optimax or not..

[splurge]

Late to the thread as usual, but just for information:

 

Standard unleaded is 95 RON

 

Premium unleaded is 97 RON

 

BP Ultimate is also 97 RON (I though 98, but it isn't)

http://subsites.bp.com/ultimate/uk/petrol/default.asp

 

Shell Optimax is 98 RON

http://www.shell.com/home/Framework?siteId=uk-en&FC2=/uk-en/html/iwgen/shell_for_motorists/fuels/zzz_lhn.html&FC3=/uk-en/html/iwgen/shell_for_motorists/fuels/questions_answered_0731-2003.html#6

 

Standard UK Supras can run 95 RON, but will like 97 better.

 

Standard J-Spec Supras run on 100 RON in Japan, but the engine is perfectly OK with 98 and can cope with 97. 95 RON in a J-Spec is a bad thing.

 

Hope this helps.

[Guest 500hpsupra6spd]

I usually run 1.0 bar and whack it up to 1.4/1.5 on hybrids,I always use optimax with a bottle of miller cvl.

[Alex]

FWIW - I've not heard of any cars running "better" on BP Ultimate

[Guest Terry S]

Originally posted by splurge

Late to the thread as usual, but just for information:

 

Standard unleaded is 95 RON

 

Premium unleaded is 97 RON

 

BP Ultimate is also 97 RON (I though 98, but it isn't)

http://subsites.bp.com/ultimate/uk/petrol/default.asp

 

Shell Optimax is 98 RON

http://www.shell.com/home/Framework?siteId=uk-en&FC2=/uk-en/html/iwgen/shell_for_motorists/fuels/zzz_lhn.html&FC3=/uk-en/html/iwgen/shell_for_motorists/fuels/questions_answered_0731-2003.html#6

 

Standard UK Supras can run 95 RON, but will like 97 better.

 

Standard J-Spec Supras run on 100 RON in Japan, but the engine is perfectly OK with 98 and can cope with 97. 95 RON in a J-Spec is a bad thing.

 

Hope this helps.

 

Whilst RON is good it is not everything. example, a dedicated turbo fuel may only be 102 octane, but may allow you to run more boost that a 112 octane fuel not designed for turbo's. There are certain anti detonation additives that are added specifically to turbo fuels.

 

So, maybe say Texaco uses different additives to Shell etc. I found I could run no more boost or timing on Optimax than Texaco SUL.

[Patrick_Devlin]

Any that I can afford :flame Dev