Replacing LRP??

[Whittle55]

My car runs om LRP at the moment but the garages that sell it around my area are pretty rare,

Can i change to unleaded or similar? Does the timing need to be altered if so by how much??,

Thanks
Andy.

[richard ellison]

if you have certain valves the timing can be changed.

not a big job- just needs to be done correctly.

LRP was supposed to be already phased out...  

[Martz]

There is a filter you put in the fuel line and it converts it. It costs about ?50 to do and is available from www.gsfcarparts.com

[Gambit]

you can run it on Super Unleaded without having to make any timing adjustment, and it wont do any damage whatsoever

both are 97 RON fuels

VW's dont need the lead additive, they have been using hardened valve seats in their aluminium heads since the mid 70's

[Martz]

both are 97 RON fuels

VW's dont need the lead additive, they have been using hardened valve seats in their aluminium heads since the mid 70's

So presumably, I can run my old 1985 Audi 100 on super unleaded?

[Gambit]

u sure can

[john_wintle]

Question has to be asked as to why you are running LRP at the moment?

It's not a performace fuel and should only really be used by granny in her metro of maestro that can't use unleaded fuel. ALL VW's built since about 1977 can use unldeaded fuel provided it is of the correct grade, otherwise the ignition will have to be retarded.

[SoundillusioN]

I've found that a more mature dub that's never run on unleaded may start pinking (pre ignighting) a little when run on some unleaded fuels as the octane is lower than what 4 star used to be.  Mind you saying that I think LRP was even lower than that!  Shell's optimax is the best but not always a garage when you need one.  The little extra you pay is well worth it.  If it' s not available and your dub starts making pinking noises on unleaded, just get ur ignition timing retarded a couple of degrees otherwise you can cause damage to ur valves over time.  

[Dizzie]

Retro cars said 4 star was closer to 100 octane. not sure on LRP though. Super/Optimax should be alright.

[davidhawkins_78]

One thing to bare in mind when changing grades of fuel is the timing issue.

If you have a knock sensor then your engine can adjust itself to benifit, as long as it's a higher octane ofcourse. If it's lower it can still 'adapt', but performance will obviously be less ...

Setting the timing up for a certain fuel without a rolling road is dam hard, if not impossible.

Best to keep to the factory timing settings and do your best to match the recommended grade of fuel for the car, otherwise it's a waste!