Mixing LRP with Unleaded

BLIXEMPIE

BLIXEMPIE

Honorary Master
Joined
May 22, 2009
Messages
10,453
Reaction score
1,578
Location
Pretoria, South Africa
I drive an Uno and found that mixing my petrol 80% leaded (LRP) with 20% unleaded allows me to drive significantly further per tank. I always put R100 in whenever I fill up. Filling up with only unleaded or only leaded I can only get about 80kms from R100, but when mixing I can get up to 120kms. I have tested this over and over again and works every time. Super bummed now that LRP will be discontinued by December.
 
If your car is really old you could destroy the engine by using unleaded.
 
Nanfeishen said:
You can do a unleaded head conversion with hardened valve seats and high grade exhaust valves.
Many of the older car enthusiasts in the U.K and U.S. have gone this route.
Click to expand...

Yes, I'm going to have to go that route with my 1968 Wolseley 6/110. I am not impressed! :mad:

If your car is really old you could destroy the engine by using unleaded.
Click to expand...

You won't destroy the engine, you will just run the risk of burning valves if you don't add an upper cylinder lubricant with every tank of petrol.
 
Last edited:
Fazda said:
Yes, I'm going to have to go that route with my 1968 Wolseley 6/110. I am not impressed! :mad:

You won't destroy the engine, you will just run the risk of burning valves if you don't add an upper cylinder lubricant with every tank of petrol.
Click to expand...

I recently bought a replacement inline 6 (chevy 230) for my project car, replacing the old 216 , and am now seriously considering doing the conversion during the rebuild.

Biggest problem being most parts will have to come from the U.S. :( frigging exchange rate

Any idea what sort of cost one would look at for mass purchasing of deca-litres of cylinder lubricant ? :D
 
Nanfeishen said:
I recently bought a replacement inline 6 (chevy 230) for my project car, replacing the old 216 , and am now seriously considering doing the conversion during the rebuild.

Biggest problem being most parts will have to come from the U.S. :( frigging exchange rate

Any idea what sort of cost one would look at for mass purchasing of deca-litres of cylinder lubricant ? :D
Click to expand...

I would do the head whilst the motor is on the bench, I believe it's not such a mission if you are working on the engine. At least, in your case, the Chev parts should all be off the shelf. I have a nasty idea that I'm going to have to have mine all individually done! :(
 
Yes. LRP will be discontinued by law from December. You will notice that all Shells, and since last month most Engens as well, have discontinued providing LRP. BP still supplies LRP at most stations.
 
BLIXEMPIE said:
Yes. LRP will be discontinued by law from December. You will notice that all Shells, and since last month most Engens as well, have discontinued providing LRP. BP still supplies LRP at most stations.
Click to expand...

Any sources on this?
 
BLIXEMPIE said:
Yes. LRP will be discontinued by law from December. You will notice that all Shells, and since last month most Engens as well, have discontinued providing LRP. BP still supplies LRP at most stations.
Click to expand...
So what are we supposed to do if we usually fill up with LRP? Are there any dangers to switching from LRP to unleaded?
 
mercurial said:
So what are we supposed to do if we usually fill up with LRP? Are there any dangers to switching from LRP to unleaded?
Click to expand...

If you read the whole thread you will see what "dangers" lie ahead for those of us with older cars. The primary one is burnt valves, as Unleaded does not have the lubricating properties found in Leaded petrol.
 
BLIXEMPIE said:
Yes. LRP will be discontinued by law from December. You will notice that all Shells, and since last month most Engens as well, have discontinued providing LRP. BP still supplies LRP at most stations.
Click to expand...

This is the first I have heard. Drove past the local Shell and Engen today and plenty of LRP.
 
xumwun said:
Any sources on this?
Click to expand...

Well I've asked at many stations, and they all say the same thing.

Toilet_Duck said:
This is the first I have heard. Drove past the local Shell and Engen today and plenty of LRP.
Click to expand...

I have also seen many stations that still have the red signs on their pumps that state LRP, but these have been converted to 95 ULP, they just need to change the stickers on the pumps.
 
Look, if your car is so old that unleaded fuel will damage it then I'd say its about time that something damages it and puts it out of its misery. With the exception of some rare classic that should be parked in a museum of course.
 
I'm sure if they do discontinue LRP, there will be some sort of additive sold on the forecourt, similar to two stroke etc.
 
Rouxenator said:
Look, if your car is so old that unleaded fuel will damage it then I'd say its about time that something damages it and puts it out of its misery. With the exception of some rare classic that should be parked in a museum of course.
Click to expand...

Disagree completely. Classics should be driven too. Nothing better than a great classic IMO. Although, modifications should be made in order to prevent damage.
 
Rouxenator said:
Look, if your car is so old that unleaded fuel will damage it then I'd say its about time that something damages it and puts it out of its misery. With the exception of some rare classic that should be parked in a museum of course.
Click to expand...

Give me an old classic car over the new cr@p any day, much more style.

Toilet_Duck said:
I'm sure if they do discontinue LRP, there will be some sort of additive sold on the forecourt, similar to two stroke etc.
Click to expand...
Additives are a generally a con, they only make you poorer and the garage owner richer.
 
You must log in or register to reply here.
Back
Top
Sign up to the MyBroadband newsletter
X