This has confused me. I ordered a reprinted manual for my new old mg midget and it says it should be filled up with 97 RON 4 star.
Can i run it on 97 RON unleaded?
[Edited on 15-7-08 by speedyxjs]
yes it’s the same, it will be fine.
97 RON is super unleaded rather than the regular unleaded which is 91 RON
[Edited on 15/7/08 by neilj37]
The only difference I presume is that you will burn through the valve seats without the lead additive.
Steve
quote:
Originally posted by speedyxjs
This has confused me. I ordered a reprinted manual for my new old mg midget and it says it should be filled up with 97 RON 4 star.
Can i run it on 97 RON unleaded?
quote:
Originally posted by Howlor
The only difference I presume is that you will burn through the valve seats without the lead additive.
Steve
i heard years ago that old engines that were running leaded petrol for years and years were ok to run unleaded for a while as they built up enough lead deposit in the fuel system to be safe, but how long for (and if its true) i don't know.
There are those things you drop in the tank that are supposed to do the same job as the lead.
Steve
if you keep the revs down and don't do many miles you will prob get away with it.
But i think this is going to be your daily driver?
You can buy lead additives that will help but you prob be better getting the heads modified.
I run my frogeye on unleaded with an additive.
Other solution is a metro head
GeorgeM
Other solution is a metro head
GeorgeM
castrol valvemaster + and it does work ive used it for years in many a classic car
plus i will be useing it in my indy
quote:
Originally posted by rusty nuts
Other solution is a metro head
GeorgeM
Midget had two engines during its life
1961-1974 Chrome bumpers had A-series in 948, 1098 or 1275cc
1974-1980 Rubber bumpers had a 1500 Triumph spitfire engine (complete with chocolate crank).
quote:
Originally posted by mr henderson
quote:
Originally posted by rusty nuts
Other solution is a metro head
GeorgeM
1500 ?? IIRC So Metro head is no good?
quote:
Originally posted by trogdor
You can buy lead additives that will help but you prob be better getting the heads modified.
quote:
Originally posted by blakep82
i heard years ago that old engines that were running leaded petrol for years and years were ok to run unleaded for a while as they built up enough lead deposit in the fuel system to be safe, but how long for (and if its true) i don't know.
quote:
Originally posted by trogdor
if you keep the revs down and don't do many miles you will prob get away with it.
But i think this is going to be your daily driver?
You can buy lead additives that will help but you prob be better getting the heads modified.
quote:
Originally posted by Howlor
There are those things you drop in the tank that are supposed to do the same job as the lead.
Steve
quote:
Originally posted by rusty nuts
quote:
Originally posted by mr henderson
quote:
Originally posted by rusty nuts
Other solution is a metro head
GeorgeM
1500 ?? IIRC So Metro head is no good?
1275 Metro
Out of interest has anyone actually experienced burnt out valve seats first hand through running low ron fuel?
quote:
Originally posted by Fatgadget
Out of interest has anyone actually experienced burnt out valve seats first hand through running low ron fuel?
quote:
Originally posted by DRC INDY 7
castrol valvemaster + and it does work ive used it for years in many a classic car
plus i will be useing it in my indy
quote:
Originally posted by neilj37
97 RON is super unleaded rather than the regular unleaded which is 91 RON
Cheers guys
Iv got some castrol valvemaster and used that when i came back after picking it up so il just keep using that.
With leaded petrol as well as acting as an octane booster the oxides of the lead coat the valve seat and that prevents wear. Without lead you need
hardened valve seats to prevent this. Lead substitute will work according to the producers. If the seats are wearing then the tappet clearences get
smaller and the valves don't seat properly, gas escapes and the valves burn out.
Use a substitute and check the tappets regularly and you should be OK.
An alternative to those ball things in the tank/fuel catalysts is before getting in the car, to stick 2 spoons up your nose, spin around shouting
"Dooby,dooby I'm a loony" then jump in and away you go; problem sloved!
adrian
Leaded petrol is still available, there's a garage near us which sells it. A lot of the classic MG guys go there. But.....it's over 8 quid a gallon!!
quote:
Originally posted by Marcus
Leaded petrol is still available, there's a garage near us which sells it. A lot of the classic MG guys go there. But.....it's over 8 quid a gallon!!
quote:
Originally posted by andyps
quote:
Originally posted by Marcus
Leaded petrol is still available, there's a garage near us which sells it. A lot of the classic MG guys go there. But.....it's over 8 quid a gallon!!
Isn't unleaded somewhere near that now anyway!