Super - Super Unleaded!!!
Discussion
Went to a party last night and got chatting to a girl from Shell, turned out to be quite high up!
She informed me that Optimax is due to be replaced by V Power, the same as Europe but this will still only be at least, as is Optimax, 98RON. V Power Racing is avaliable only in Germany and is 100RON or over, there are no plans for this product to come to the UK.
She informed me that Optimax is due to be replaced by V Power, the same as Europe but this will still only be at least, as is Optimax, 98RON. V Power Racing is avaliable only in Germany and is 100RON or over, there are no plans for this product to come to the UK.
kojak said:Why should it be better? The engine is mapped to require a minimum grade - anything over this is wasted since the TVR engines can't adapt. Unless you get it mapped specially, or have the AJP Red Rose.
Sounds good. I cant see any reason why not to use it. It should be better.
dannylt said:
Sounds good. I cant see any reason why not to use it. It should be better.
Why should it be better? The engine is mapped to require a minimum grade - anything over this is wasted since the TVR engines can't adapt. Unless you get it mapped specially, or have the AJP Red Rose.
Whats the 4.2 mapped to then 95, 97 or 98?
kojak said:
kojak said:
Sounds good. I cant see any reason why not to use it. It should be better.
Why should it be better? The engine is mapped to require a minimum grade - anything over this is wasted since the TVR engines can't adapt. Unless you get it mapped specially, or have the AJP Red Rose.
Whats the 4.2 mapped to then 95, 97 or 98?
I have run my 4.2 on 95RON but only with a Octane booster added, and I only did this when I could get anything else! I think its mapped for 97.
You will find that as the TVR engines do not have knock sensors, so the engine can not adjust for the higher octane rated fuel. Although it’s impossible for the engine to adjust but you will find that you will have greater ‘power per punch’, due to its slower burn rate.
To sum it up, running 98RON or higher will not do your engine any harm, you will get more power (slightly) but you will not get the advantages that you would get from a car with a knock sensor.
(I think)
AFAIK, V-Power fuel is only 95RON - here in Ireland no-one sells Octimax.
A relatively small number of stations sell Super-plus, either 97 or 98 RON, mostly Esso or Texaco.
I use that when possible, but as it's mostly not available I use 95 with a bottle of ocane booster in each full tank. In fact I worked out it's cheaper to use the octane booster than it is to pay the extra cost of the Super-Plus fuel!
A relatively small number of stations sell Super-plus, either 97 or 98 RON, mostly Esso or Texaco.
I use that when possible, but as it's mostly not available I use 95 with a bottle of ocane booster in each full tank. In fact I worked out it's cheaper to use the octane booster than it is to pay the extra cost of the Super-Plus fuel!
I am most suprised that any retailer is offering 99 RON fuel. I don't think any UK refiner is producing it currently.
Who supplies Tesco is purley based on there location and which refinery/distribution terminal is closest.
Perhaps they are adding octane booster with the other additives and detergents.
Please be aware that the addition of detergents and additives is the one part of the complex fuel production system that is not done at refineries and hence does not undergo the same quality control procedures. I think it is this that has given supermarkets a bad name as the base fuel is identical only the additive may vary.
The other thing to bear in mind is that RON (Research Octane Number) is not a particularily good indication of of fuels performance under load. Much more important is MON (Motor Octane Number) and distillation charactaristics.
RON is always a higher value than MON as it is measured at lower revs and retarded ignition timing.
Who supplies Tesco is purley based on there location and which refinery/distribution terminal is closest.
Perhaps they are adding octane booster with the other additives and detergents.
Please be aware that the addition of detergents and additives is the one part of the complex fuel production system that is not done at refineries and hence does not undergo the same quality control procedures. I think it is this that has given supermarkets a bad name as the base fuel is identical only the additive may vary.
The other thing to bear in mind is that RON (Research Octane Number) is not a particularily good indication of of fuels performance under load. Much more important is MON (Motor Octane Number) and distillation charactaristics.
RON is always a higher value than MON as it is measured at lower revs and retarded ignition timing.
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