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My heffalump (P38a) loves high octane ethanol blend,
In comparison to normal premium unleaded it runs slightly smoother, has slightly more power and generally 'feels' happier.
I would say this is because the ECU senses the higher octane (less knock )
I am very careful to change my primary fuel filter at every oil change.
Duuno when things changed, but I'm sure in the old days all V8s were built to run on lower grade petrol - available anywhere. PULP wan't available everywhere.
Regards
Max P
I use the normal 91RON fuel but if there is an ethanol blend I'll use that. I think the ethanol is sold at 95RON.
I use the ethanol stuff as it is supposed to clean. Like using the higher 98RON fancy stuff with its detergents I suppose.
Also using ethanol blend makes me feel better about using 16L/100km and killing our children's children :D
ok for aust fuels
pure unleaded should be between 91-93 ron but can go as high as 95 on a good day.
unleaded with 10% ethanol should be between 93 and 95 ron and is typically nearer to the 95 mark.
PULP must be 98 ron and can go higher.
pre 97 v8s will run on all of the above
after that you need to read your drivers book.
The pulp is not quite as good as the stock unleaded in the 2.25's due to the cost and the ethanol blended stuff while not quite as good at the bottom end of the rev range is generally cheap enough to make it viable.
your milage may vary :)
That's what the WM says. '91 Ron unleaded Minimum'.Quote:
pure unleaded should be between 91-93 ron but can go as high as 95 on a good day.
My RRC manual (by "Land Rover" ???) says:Quote:
Originally Posted by Tusker
"With the exception of the 9.35:1 high compression (emission) engine which is designed to operate on 97 octane fuel (British 4 star rating) all other Range Rover engines are designed for fuel having a minimum octane rating of 91 to 93 (the British 2 star rating)."
My other (Haynes) RRC manual says something like: Designed to run on low octane fuels (89 to 91). No advantage will be gained from the use of higher octane fuels. (- not a direct quote).
As mine is a '79 RRC i have never used anything other than regular ULP with the Flashlube additive.
PETROL...I was thinking of becoming a black market dealer..:D:D
Hijack a tanker and sell it off at a $1 per litre:D:D:D:D:D:D
easy and more money than drugs these days......:D:D
Just kiding;)
Go Premium
You should get better power and at worst same economy.
If i ran petrol in my V8 Fairlane or 202 Landy thats all I would buy.
For all you small motor users.
ONLY USE PULP!!!!!!
The price difference on 5lts is bugger all.
My chainsaw/whippersnippers HUM on PULP/synthetic 2 stroke mix!!!!!,The 4 stroke mower loves pulp too!!!!
Andrew
Ahhh well, some interesting food for thought...
Your ignition timing and system is set up for a certain fuel rating. If your vehicle manual says run 91, then run 91, if it says run 95, run 95. The reasons...:
The advance curve on an ignition system for 91 octane fuels are different from 95s and both are different from 98s etc. The theory is that 95 will burn 'better' (longer and hotter) than 91, and 98 above both. Hence you need to spark earlier to get it all to burn! On fuel injected electronically controlled spark timing its not such a huge issue...the ecu can calculate based on emission levels and knock sensors when it should be lighting up so to speak. On poor old carby things such as both my new-old 110 and my daihatsu rocky, with simple mechanical (spring and weight) and vacuum advance mechanisms, putting the upper grade fuels in is not only pointless but potentially damaging. If the fuel burns longer I run the risk of having the fuel still burning as the water-jackets down my bores are exposed. I'm not one to enjoy overheating my vehicle...
Lesson being, use what the manufacturer -originally- specified...