What fuel for a Digi?

[Godzilla]

I looked inside the fuel cap (checking for any rust!) of a 1990 Digi im buying and it said 98. Does this mean this car will have to be run on Super Unleaded?  I used normal 95 in my previous Digi's and they seem to have ran ok, but neither had a sticker on inside of cap.

[Horney]

It's fine on any unleaded as it has a knock sensor that adjusts the timing depending on the fuel.

Nick

[DarnPB]

98 is the safer fuel as these are higher compression engines, therefore the charge burns a little hotter.
The higher the octane, the more anti-knock agent the fuel has. This helps prevents the onset of detonation at high burning temps.

[Jay]

Go to Tesco, get shopping worth £50 then get the 99 ron at a cheaper rate (with the voucher -5p on every litre)

[Godzilla]

Go to Tesco, get shopping worth £50 then get the 99 ron at a cheaper rate (with the voucher -5p on every litre)

Thanks mate 

Would 98/99 ron make a differance to performance then to an 8v Digi.....also would it use more fuel being its higher octane?

[DarnPB]

The performance by using 98 would not change. The general census of opinion is that the higher the octane rating, the more performance. This is B.S. High peformance engines running high compression ratio, or turbos need higher octane ratings to reduce the risk of engine damaging detonation. If you have a normal engine for the average family car, then 95 is adequate. But for our Golf GTI's, although by todays standards have pretty mediocre power outputs, they are still high compression ratio engines and benefit from higher octane rated fuels.
In days of leaded petrol, tetra ethyle lead (TEL) was added to petrol to increase the octane. 100 octane which equates to about 6 or 7 star, is used for most light aircraft with 130 octane being available for high performance piston engined aircraft or high altitude planes. TEL has been replaced by another anti knock agent for todays lead free fuels.

[Mk2Kezza]

I have tried both fuels 95 and super unleaded and there is no noticable difference - you have to remember that your engine will be at least 16 years old and thats if it is one of the newest mk 2's. Some people claim to see a difference and to be honest I did - in my wallet!!
You'd probably see a difference if you had an impreza or a another highly tuned car!

Have a search for 'which fuel?' and i'm sure there is enough discussion for you to make up your own mind 

[Jay]

I find that my car is not as jerky/shakey with 97/99 ron at low speeds (pulling off/traffic)

[cняis]

my digi pinks/detonates often under load with 95 ron.

the knock sensor wiring is all cracked tho, so probably doesnt work too well...!

[JC]

with Mk2 Kezza on this

Tried runing both boggo unleaded and BP Ulitmate .

Only difference - bigger dent in the wallet - oh and mines a Valver