A couple of queries re fuel:
Is Shell Optimax suitable as a replacement for leaded petrol
Does it give better mpg than 2 star (in a suitable engine)
TIA
A couple of queries re fuel:
Is Shell Optimax suitable as a replacement for leaded petrol
Does it give better mpg than 2 star (in a suitable engine)
TIA
As far as octane rating is concerned, yes. As far as valve seat protection is concerned, no.
Yes, but I doubt if it justifies the extra cost over normal unleaded. N.B. the star ratings apply to leaded petrol.
No. Unless you're valve seats can already handle unleaded. The best answer for a car which can't use unleaded is Tetraboost - pretty much the only additive which when added to 95 Octane Unleaded will give you 97 Octane Leaded (i.e. it adds the Lead).
Creating your own Leaded petrol is perhaps a little dubious but it's legal and Tetraboost has recently been approved by the FBHVC.
Where do you get 2 star this century?
Perhaps he is asking if it is equal to *what* 2 star was,,,, ;-)
Shell Optimax and Castrol Valve Master are a good combination. Higher Octane from the optimax will help the engine run better, and valve master should help the valveseats. Or an altenative to Castrol Valvemaster is Millers Superblend zero lead 2000.
Does this mean that if you add Tetraboost to Optimax you get 100 octane? Or doesn't the chemistry work like that?
Jim
2.5 PI Jim?? ;-)) I asked this question a while back, can't remember getting an answer but I'm sure it's a simple arithmetic situation, given that dosing up with "homebrew" mixes made of lacquer thinners and the like will apparently keep adding those octane points!
Anyone?
I'm tempted to add Millers VSP Octane Boost and Lead Replacement to Optimax (98.5ron) to try to dial in some more advance. At 20mpg there's little point to me counting the pennies considering the limited mileage I do (less than
3000 per year).
Yes, that's me :-)
The PI is resting until they stop putting salt on the roads, but if I can find a supplier of Tetraboost in the mean time, I think it is worth a try. Google here I come!
I'm getting about 24mpg and am doing about 2500 miles a year in the PI, so I have got even less to lose.
Jim
Through the magic of Google, I can answer my own question. See
I'm using mine, scrubbed the kerb the other day trying to avoid a gritter. My other transport is poorly with cylinder head removed right now so the PI has had to bear the winter brunt. I've enjoyed every minute aside from the micro brown spots appearing on the thin old original paintwork. :-(
24mpg? What sort of driving? I get 18-20 on my daily two-commute of 10 miles total - urban with a short blast on a dual carriageway.-- Ken Davidson
snipped-for-privacy@removehotmail.com remove remove to email
I'm retired, so I rarely travel in the rush hour in it. And most of my journeys are sightseeing or visiting relatives, so over 50 miles and mostly motorways or A roads.
I've got a 2000 for local shopping trips and that sort of journey only gives me 18mpg. It does the winter journeys too - and collects the rust from the salt :-(
Jim
Why not just buy proper leaded 5 star, if your mileages are low and pre-planned??
MrCheerful
>
You know where they can buy it ??
Leaded petrol which is the equivalent octane rating to 5 star (according to the makers) is available all over the country.
A list by county is available here:
See
LOL the nearest one to me is 12 miles away,,, its a bit of a journey just to get petrol
Surely you go out to go somewhere, not just to buy petrol?
MrCheerful
yes but not always in the direction of the only 2 gararges that are withing
50+ miles of me that sell 5star....MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.