Is premium neccessary for a NA33

[turbomad]

Can you get away with normal unleaded or what about 95ron fuel? Or is the 98ron a must?

[NA_R33]

Its most definately not needed, though jap cars are tuned for fuel even higher than our premium, u will get better economy due to higher efficiency from premium, but no noticable power increases, unless u advance ur timing with the better fuel.

[Pva_Glue]

I ran my skyline normal BP unleaded... never had problem

in few months I squirt some octane booster... that's aobut it.

really there is no need use high octane in NA cars.... as long as unleaded is Clean enough.

cheers

Joe

ps. I dont take any responsibility for any action due to above commments...

[ferni]

no need for premium as mentioned...

premium is generally only needed on engines that are put under a bit of stress, to stop the fuel combusting before the spark plug ignites it... your N/A shouldn't have this problem..

[Cecam]

For some cars yes, for others no. My Bluebird (SR20DE) ran on normal happily, but my R32 Skyline GTS (RB20DE) pinged pretty bad on anything but premium, and thats at stock timing of 15 degrees too. I could of reduced the timing to run normal unleaded, but that defeats the purpose really as you get worse fuel eco with reduced timing (as well as reduced response)... Try it, and listen very carefully with it loaded up some hills and some detonation isn't very audiable...

[RTHRTY3]

I use premium but not always 98RON (only when its at the same price as premium, which is really really rare :bs!: , and its more suitable for turbos and really modded n/a anywayz). I find its more economical, you get more kms from premium rather than using normal unleaded. Not sure about performance though, but yea worth the extra 5c and u get cleaner injector i guess.

Experiment a little see which ones the best.

p.s. as PVA_Glue says...I dont take any responsibility for any action due to above commments...

[gatty]

i always use eith BP ultimate or if i must shell optimax in my car - i don't mind paying 8c a litre more....it is a sports car after all they ar enot designed to be cheap

[turbomad]

Thanks for the reply guys, I've got a Turbo33 at the moment but am in the process of selling the wifes VTSS(supercharged V6), I wanted to get her a WRX but she doesn't like them, she'd prefer a Skyline so I thought to go NA as it will save us on insurance, fuel and hopefully the initial purchase cost, plus I think they would go quite well as my GTS-T still accelerates nicely even when not in boost.

[NuGGeT]

yeh the n/a is a nice little car. still has enough balls and the looks. cant go wrong.

[predator]

Turbomad: my mate went for a n/a for much the same reasons as you mention.

He is very happy with his purchase so far.. and saved $5k on what a decent turbo would cost + the extras. Exactly the same features and look anyhow other than the gofast bits. Still drives very nicely, and just a good car all round. Nothing local could offer same specifications or features for a similar price.

Insurance was around $800 through justcars for an n/a too for a 25y/o+ driver.

[RTHRTY3]

Can you actually have premium and 98RON mixed together in 1 tank, like half of each? Can this do any harm?

e.g. you have half a tank of premium left, and than u found out 98RON is the same price as premium and thought u'd might as well fill up.

Please advise.

BTW, this is for a N/A not Turbo line.

[NuGGeT]

yeh man, doesn't do any harm. if it did my car would have been long dead. and so would most peoples.

the fuel will just mix together

[Greg]

I always use 98 ron just for the peace of mind, and in my opinion the car runs a lot smoother on 98 than premium (95). Once I added octane boost to 98ron fuel and it ran smoother again. They are tuned for 100+ron fuel so you might as well get as close to that as you can. Sure its probably not necessary, but why skimp? Asuming you save 5c per litre by getting premium instead of 98, this is only a saving of $3 per tank - which is hardly significant.

Cheers

Greg

[09ONE_32]

well actually the two different octane ratings means that no the fuels won't mix in the tank. The specific gravity of the fuels is different, due to their different octane rating, the 98 is denser and will make it's way below the 95. But yeah no problem in putting half and half in the tank.