What PETROL

[alendil]

hi
What petrol to put in legnum whats best whats good whats cheap

[ANTHONY]

hi
What petrol to put in legnum whats best whats good whats cheap depending where your from i always use sainsbury's super unleaded and shell V power .......... nothing less will do

[Nick Mann]

I don't touch Sainsburys.

V-Power is a safe bet and often amongst the cheapest of the supers. It is often higly placed in independant tests as the most powerful/cleanest etc....

I personally get good results from Tesco 99 too.

The cars ECU detects knock from the engine (Google engine knock for a decent explanation!) and pulls the timing and thus the power. This hurts fuel economy too. 95 RON petrol will cause a small amount of knock and the ECU to take action - how much depends on the fuel and the car but I only ever use 95 as a get me home jobby. The car is designed for 100 octane fuel so even super is sometimes not good enough!

[TAR]

Tesco 99 unleaded for me too, and no issues with it.
Occasionally use Shell V-Power and that seeems fine as well.

:happy:

[elnevio]

Usually Tesco 99, have had the odd tank or two of Shell V-Power and BP Ultimate. No probs to report!

[Kieran]

Tesco 99 unleaded for me too, and no issues with it.
Occasionally use Shell V-Power and that seeems fine as well.

:happy:

Same here. I've logged runs in EvoScan and at high boost (0.9bar) it doesn't knock on Tesco 99 or Vpower. :)

[alendil]

hmm i am living in leyburn ( middle of dales)
and i have caterick garrison tesco ( no 99) and i my area is only 95
i am using jet (better then tesco ) but i am looking for something better

[Ryan]

Same here. I've logged runs in EvoScan and at high boost (0.9bar) it doesn't knock on Tesco 99 or Vpower. :)

No knock at all?

[KiwiTT]

No knock at all?

NOTE: Our V-Power is only 95/Grrr

[Nevman]

V-power only

BTW:

alendil,
have you received my PM?

[OnBoost!]

I use Bp's 98 Ultimate, i never mix it with anything else.

[Ryan]

NOTE: Our V-Power is only 95/Grrr

I know but Kieran is saying that he's not getting any knock at all which I'd like him to expand on a little if he can ;)

[Nick Mann]

In the UK V-Power is 98.

95 is normal fuel - we don't get a lower octane than that.

[Kieran]

I know but Kieran is saying that he's not getting any knock at all which I'd like him to expand on a little if he can ;)

Bah, and I fall into the trap of posting something untrue by virtue of not specifying my parameters! /pan /pan

To clarify - I should say that on WOT in any gear there's no knock detected using either V-Power or Tesco 99 (Both 99RON). Very occasionally there's a knock count of 1 on part throttle at low RPM/load, but to give you some indication, on a log of a 45 minute drive to work, this happened twice, and both times it was under light load conditions.

[Rambaud]

I read somewhere over the week-end that older Japanese engined cars should not be run on petrol with over 3% Ethanol content. Is this correct?

And does not Tesco 99 contain 5% Ethanol?

[Ryan]

I read somewhere over the week-end that older Japanese engined cars should not be run on petrol with over 3% Ethanol content. Is this correct?

And does not Tesco 99 contain 5% Ethanol?

The jury seems to be out on this as I have read conflicting information regarding the use of petrol with an ethanol content. I know of one CVR-4 member who has used an ethanol blend in their ST-R and the results were not inspiring.

That said, I plan to revert my car to standard boost - fill it with one tank and monitor the knock count.

[alendil]

wright my local tesco is seling super unleded 99
but what abaut this ethanol is this good petrol or stick to normal 95
becouse in my place only tesco ( so far ) is doing somethink beter than 95

[miller]

ethanol is a totally different ball game! stick with the Tesco Super 99. All will be okay. I have just gone back to TEsco 99 and am gonna log a run at the weekend once enoughs run through from mu last tank of V Power. I experience knock count of 3 under partial load with V power.


Mike

[alendil]

how you experienc knock in engine ( i know whats that but how you hear that or fill or what )

[Ryan]

how you experienc knock in engine ( i know whats that but how you hear that or fill or what )

I don't think you will be able to "feel" it knocking, unless you maybe put in some really bad petrol. When the ECU detects knock, it retards the timing and dumps more fuel into the combustion chamber.

Essentially you will experience less power and your fuel consumption will increase but that's about it.

Someone else will be able to confirm or correct me on this :)

[alendil]

so i am sticking to super 99 from tesco ( it seams to be beter in miles on thise petrol)

[miller]

you will never feel knock until its waaaaaay too late! Yes the ECU will pull itself back to acomodate the crap fuel. Knock up to 5 is common and nothing to worry about, its when Knock gets well into the double figures its worry time