Here's the scenario, my mini runs on 4 star (leaded petrol) In Thetford, they have phased out 4 star, but i need fuel in order to take my car to the MOT station on monday. so my question is; i know that unleaded isn't good for my engine, but will it be o.k. for £5 worth in the tank or will it seriously fu#k it up?
LRP Question.
Started by
*DJH*
, Apr 14 2007 09:56 AM
5 replies to this topic
#1
*DJH*
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Posted 14 April 2007 - 09:56 AM
#2
biggav
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Posted 14 April 2007 - 10:03 AM
yes.. you should have adequate lead protection on the valves for short term unleaded use... but i'd be looking for some lead additive to put in in the near future.
#3
*DJH*
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Posted 14 April 2007 - 11:35 AM
Well that was exciting, just been out hunting for the illusive 4 Star and still couldn't find any, however I got 5 litres of unleaded came back, topped the car up. Then went out again to find the additive at the local car shop where we did a deal securing two bottles which treat 250 litres worth of unleaded.
So all that panic for nothing
Cheers for the info Gav, I thought it would do more harm than good.
So all that panic for nothing
Cheers for the info Gav, I thought it would do more harm than good.
#4
Dan
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Posted 14 April 2007 - 10:48 PM
4 star hasn't been phased out, it's limited in supply but it is still available. Bayford Fuels is still producing very high quality 4 star for classic cars and it is available at a fair few stations. The Leaded Petrol Website has a list of where Bayford 'Thrust' as it is called is available, you never know there might be somewhere nearby.
#5
*DJH*
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Posted 15 April 2007 - 07:13 AM
Thanks for the link Dan. That'll come in handy 
#6
Guess-Works.com
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Posted 15 April 2007 - 08:17 AM
please remeber LRP is NOT 4 Star.... 4 Star is LEADED petrol and as Dan has pointed out, still available from selected garages...
LRP ( Lead Replacement Petrol ) has/is being phased out, basically as it's poo....it is unregulated petrol ( does not have a BS kite mark ) therefore you have no guarentee or come back ( unlike those affected by the silicon in the unleaded petrol from supermarkets ) if the fuel screws your engine, which it probably will...
If you have not got an unleaded head then you are better off using unleaded with an additive ( I would recommend Castrol Valvemaster Plus which also has an octane booster ) which should bring std 95 unleaded upto the same specification as 4 Star....
If you have a high compression motor, + 10:1 then I would use super unleaded 97 ron, and the additive.
LRP ( Lead Replacement Petrol ) has/is being phased out, basically as it's poo....it is unregulated petrol ( does not have a BS kite mark ) therefore you have no guarentee or come back ( unlike those affected by the silicon in the unleaded petrol from supermarkets ) if the fuel screws your engine, which it probably will...
If you have not got an unleaded head then you are better off using unleaded with an additive ( I would recommend Castrol Valvemaster Plus which also has an octane booster ) which should bring std 95 unleaded upto the same specification as 4 Star....
If you have a high compression motor, + 10:1 then I would use super unleaded 97 ron, and the additive.
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