Bleech

Hi Guys,
Hope I don't sound like a spud, but I need your advice.
I've just bought a 88 2.7 944 and I just want to check what petrol I should be putting in it . The previous owner told me to use unleaded, I just thought I'd double check that with you guys to see if that is ok.
Thanks in advance,
Bleech

Campeck

i think it says what you need to use in the gas cap

Bleech

I've checked in the fuel door, but not inside the gas cap, will do that, cheers mate.

Campeck

oh
and welcome to rennlist
carefull though (its addictive)
and no problem

Campeck

oh
and by the fuel door you mean the door that you open before you take off the gas cap right
cause its not in the gas cap itself sorry
i think its unleaded 98 isnt it

josephsc

There's supposed to be a sticker inside the fuel door -- the sticker might be missing, though. My 1987 2.5l 8v engine took 87octane. I believe the 16v engine in the 944S used higher. Exactly, what do you have under the hood? The 2.7l motor wasn't used in 1988 cars.

Oh, and welcome to rennlist!

Bleech

Thanks for the welcome.
It's defiantly a 2.7 (says on the log book) and it's an F reg. I am in the UK, maybe that makes a difference? You've got me worried now

EDIT: Actually I think I've worked it out. The car was registered in Nov 88, so I guess it's an 89 model ie. 2.7 (I Hope)

Antonio951

I have a 87 n/a and put premium fuel. Thats ok right?

Cass944

i put nothing but premium in my 86 na, always have.

Brian McCoy

To get the most bang for your buck you want to use the LOWEST level fuel possible before you experience detonation (AKA ping and knock). If you use anything more, you're just spending mroe money on less performance.

This has been hashed out at least 5 times in the last year, I'm sure those of you who want more detailed information can use the search function to get just that. It's a well documented/proven fact that using higher than necessary octane fuels reduces actual rear wheel horespower and often times results in increased carbon deposits (reducing the efficiency of your engine).

DerSchlechtSpecht

I love it when people waste thier money thinking premium is better!

Christian

DerSchlechtSpecht

Brian to expand on your point we should look at it this way. Higher octane is for higher compression to guard against detonation. If you use a high octane fuel in a low compression engine without forced induction they you may experience problem getting your fuel detonate when you want it to.

Christian

Singpilot

Bleech;

Yours is the 8Valve 2.7L. Welcome to the club.

At higher elevations, the supreme might be needed to keep the knock at bay, but you might not hear it. Sea level, no prob on regular. I would switch to higher RON or Octane fuel above 2000-3000 foot elevation.

I use supreme when in Las Vegas, and go regular except in hot summer traffic when in LalaLand.

Waterguy

I believe the recommended fuel for your car is 96 RON/86 MON. Unleaded is optional, I believe, unless it is equipped with a catalytic converter. Keep in mind that the ROW 944s had much higher compression ratios than the US models (where premium was not required) until 1988. From 1988 on, the compression ratios were the same, and premium was required in both US and ROW 944s. Also, the 944 2.7L does not have knock detection to protect it in the event of lower-than-specified octane fuel. (944S, S2 and Turbo all got knock protection.)

Simkid 944

Hi Bleech,

Nice to see another UK Porsche fan has found this place!
The factory handbook for my '89 2.7 gives the fuel spec as 95 RON/85 MON premium unleaded ( ie. the 'normal', cheap stuff), regardless of wether a cat is fitted or not.

I've been tempted to try Shell's Optomax (98 RON - I think), as the guys at work swear by it for the race engines, but I really can't see any advantage when the engine isn't knocking with 95 RON.

I think the variety of fuel available in The States is quite different to the stuff we get over here, as are the engine specs for the cars.