Supercharger, 99 Or 97 Ron?

[Nick The Greek]

the s/c kit for the IS200, will it run on regular unleaded? or does it require super?

reason being, My fuel card from work only covers regular unleaded, and I do about 20k a year, so it's rather critical I put the right fuel in....

[Monster-Mat]

98 is the recomended minimum

[Fargo]

optimax is the way....

[Nick The Greek]

bugger, so running on standard unleaded is a definite no-no?

[Mr Singh]

My local tescos sell 99ron now :D

not tried it yet.....

[Adie]

My local tescos sell 99ron now :D

not tried it yet.....

←

So does mine and they've dropped the price to 94p per litre

[lexus boy]

but 99 could be 97, as it isnt guaranteed quality.

in reality makes bugger all difference, unless u get proper ron stuff, not out of pump

[Nick The Greek]

Is it documented somewhere offically that only super unleaded should be used with this kit?

This will be the deciding factor on whether I get an S/C kit or not

[Gord]

lots run s/c on just unleaded billybandit has run his on this with no problems :D

[Rob]

Is it documented somewhere offically that only super unleaded should be used with this kit?

This will be the deciding factor on whether I get an S/C kit or not 

←

yes TTE recommend that only RON98 ( this is what we have in europe) or higher should be used.

but i do know a few people that only use 95 and so far i dont think they have had any probs

[Nick The Greek]

what would the consequences of using 95 RON be?

bearing in mind I do about 20k/year, so it'll get used a lot.

[Adie]

In the Lexus manual it says to use superunleaded in the car and thats standard. So i'd definatly use it for the s/c. Although i did run my s/c for about 2 months on unleaded and had no probs.

[lexus boy]

i run the s/c on normal unleaded getting loads of miles to gallon as well, lot better than aido, probably why.

but fact being 95 and 98 are not guaranteed on domestic use fuel. so u could be paying extra for not much more

[Mr Singh]

but fact being 95 and 98 are not guaranteed on domestic use fuel. so u could be paying extra for not much more

←

Yep i agree with you there.

when first got my altezza i ran it on regular unleaded, didn't know it need 98ron or more. when i did change to 98ron, i didn't notice any difference what so ever.

would be interesting to see lab results confirming octane levels of all the various fuels etc...

[Bazza]

off topic but almost relevant

i filled my vauxhall astra up with optimax , due to petrol crises the other week ;)

it ran like a pig , kept missing and was well down on power

since having been refilled with cheapo 95ron it has reverted back to normal

occaisonly i have used 95 on the lexus, and never noticed any difference

[Mr Singh]

Maybe its a conspiracy theory the japs thought up with the oil suppliers....

"we'll shaft all jap owners to make you guys more money by insisting use of higher octane fuels"

lol

[Mr Morse]

off topic but almost relevant

i filled my vauxhall astra up with optimax , due to petrol crises the other week  ;)

it ran like a pig , kept missing and was well down on power

since having been refilled with cheapo 95ron it has reverted back to normal

occaisonly i have used 95 on the lexus, and never noticed any difference

←

Normally I fill the Starlet with 95, but it pinks under load, so the last 2 fills have used 97 or 98 SUL and the pinking has just about disappeared

[aido]

Have to admit guys as I posted on here a few times I had problems with my car when running on 95 or 97 RON fuel, as soon as I started using Optimax again (98) the engine actually sounds healthier (I can physically hear a difference) and the car doesn't have the problems it had before, seems that running on 98 has fixed the problem!

[Mr Morse]

burp....fart....burp....big fart....etc

[aido]

and that's just the car making those noises!!!

[lexus boy]

but fact being 95 and 98 are not guaranteed on domestic use fuel. so u could be paying extra for not much more

←

Yep i agree with you there.

when first got my altezza i ran it on regular unleaded, didn't know it need 98ron or more. when i did change to 98ron, i didn't notice any difference what so ever.

would be interesting to see lab results confirming octane levels of all the various fuels etc...

←

they would change from station to station and even week to week

[Mr Morse]

but fact being 95 and 98 are not guaranteed on domestic use fuel. so u could be paying extra for not much more

←

The octane rating on domestic fuel is governed by British Standard. Therefore if it says 95 or 97 on the pump, that is exactly what you are getting.

[lexus boy]

But they dont have to be exact do they, they can be out

[Mr Morse]

But they dont have to be exact do they, they can be out

←

I can't remember the exact tolerances that BS allows but it is very tight. So, to all intents and purposes 95 is 95 and 97 is 97 and so on.

[lexus boy]

was told different, always thought that was reliable info

neway in that case ill give it a bash and see what happens, she seems to run fine now neway. but will see.