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Which fuel?

graham tompkins

graham tompkins

New member
Hi Peeps,

Interested to hear opinions on fuel grades being used. Depending on who you speak to, opinions seem to vary regarding the grade of fuel used. Standard unleaded 95 RON, Super Unleaded, Premium Unleaded, or Optimax?

Do any of these make any difference other than the allegation that Optimax has additive cleaners....at a price.

Modern cars (my X5 for example ) will automatically adjust itself according to the fuel being used so it does not make the slightest scrap of difference what unleaded fuel you use, but in 1989, were the systems that good?
When I bought my car the PO confirmed that he'd used standard unleaded with no problem. I have done likewise, but put a shot of super in, and also half a tank of Optimax, and I can detect no difference whatsoever, other than in my wallet.
Just getting to another fill up!

regards
Graham




 
Checking in the handbook ('87) when I bought the car it said to use leaded premium 98 RON. I checked around regarding the leaded bit and everyone convinced me that unleaded would be fine and wouldn't lead to valve seat regression so I haven't bothered with additives.

I spoke to the previous owner and he always used Optimax so I have done the same. Don't think I have the nerve to drop the lead and the RON.

Got nothing to support the case though. It would be interesting to see if there's any science to support the view either way.

Optimax out in the sticks is priced higher than some precious metals now!

Steve
 
This old chestnut !

I think the executive summary is something like this:

1. Every Porsche since something like the 356C can run on unleaded.
2. Our 3.2s are fine to run on 95 octane.

There are other much more detailed threads from perhaps a couple of years ago if you are interested. Persoanlly, I use Optimax for the additives that EVO magazine showed do a better job keeping your engine internals clean.

RB
 
Hi Richard,
I guess what you are saying in your subtext is

Lesson 1. Check archive before asking stupid question as its possible someone else has asked it before!

And bugger me...they have!

Lesson 1 Learnt[;)]

Regards

 
Going to do my best to get there.

Do R24 troops need to wear anything distinguishing so we don't get shot as spies?

Steve
 
ORIGINAL: graham tompkins

Hi Richard,
I guess what you are saying in your subtext is

Lesson 1. Check archive before asking stupid question as its possible someone else has asked it before!

And bugger me...they have!

Lesson 1 Learnt[;)]

Regards
Click to expand...

Hi Graham,

No subtext - I was trying to be as gentle as possible in saying you may be able to learn more from searching [:)].

Hopefully the old threads gave you the info you needed.

Cheers,
Richard
 
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