Fuel

[Fat Albert]

I've been running mine on super for about a year, but due to my higher mileage and stuff, I have started putting ordinary in, 2 observations:
1. There seems to be no difference in MPG
2. It has lost a lot of it's top end punch and smoothness, as well as a bit of mid-range eagerness

But as much of my driving is currently motorway cruising i will be sticking with the cheap stuff

 

[zcacogp]

ORIGINAL: The Game

My car runs far better on super, I won't use regular unless I really have to.

Exactly my experience. And, as Fatty said, with the normal stuff it is less smooth, has less in the mid range and runs out of puff earlier.

I also see a noticable increase in MPG on the more expensive stuff, so it pays for itself. (Yes, I am sad enough to monitor fuel consumption with geek-like accuracy. And, interestingly, the pence difference between 95 and 98 has remained pretty much the same despite the recent - huge - fuel price hikes, making the percentage difference in price much smaller.)

On this basis, I can't see any reason not to use the expensive stuff.


Oli.

 

[Northern924]

My 88 2.5 states 95 on the back of the filler flap, and for me I agree with everything Albert says for all the same reasons

 

[lookingfora944]

Had a look at the inside of the filler cap and yes, it does state 95 RON
Well, I may fill up with the super stuff anyway. Looking forward to a nice long drive from London to Minehead at the weekend. Going to take the A303 instead of the motorway, for some pleasant country road driving

 

[Mike_Pollock]

Fairly sure its only the square dash cars that need 98, they changed the compression ratio on the oval dash cars to allow them to run on 95, as all non racing / homologation special Porsche cars were in the mid '80s

 

[chrishak]

Ignoring the perceived performance benefits from using high octane fuels such as V-power, these days the biggest arguement in their favour is that in the near future they will contain a lower percentage of Bioethanol than regular fuels - and this might be the case already. Bioethanol is hydroscopic and appears to have other properties that can be damaging to "older" cars. For this reason alone, I will continue to use premium fuels as I don't want to be replacing the fuel lines on my car as a regular servicing item, not to mention fixing inconvenient potential fuel injection blockages etc.
Besides, at under 5000 miles a year, the difference in outlay is hardly noticable.

 

[Northern924]

I think that is a big part of your decision as to which fuel to use, I normally use 95 as the 944 is my daily drive and these days that means £60 a week, that extra 6-10p per litre makes a huge difference to me over the year, where as those here who have theirs as a 2nd/weekend car won't notice much difference.

Saying that I do put around £20s worth of 98 every month, don't know if its detergant properties are really that beneficial but I do it in place of using the likes of Redex, could be proven wrong on the theory but there you go []