Premiumfuel - Page 3

Parker · 14th September 2020, 19:54

https://blog.greenflag.com/2019/cheap-supermarket-fuel/

Worth a read keep the thread going

Ched · 14th September 2020, 21:36

My last zt190 threw up on different occasions the eml light, plugging the code reader in threw up two fault codes, both banks were running lean, the car was running on asda fuel.
I then decided to try shell unleaded, the first tankful gave me 50 more miles out of it over the asda stuff, replicated on every tank fill afterwards, my journey to work was a 264 mile round trip, and never again did the eml light come on.

I now run a derv zt and I currently do a 202 mile round trip to work, I use either tesco or shell fuel, and I do get a better mpg from shell fuel.

I did run the car on asda fuel when I first had it, since I stopped using it the car seems more responsive and certainly doesn't smoke on acceleration and I get a better miles to tank range.

Mike Trident · 15th September 2020, 04:23

Yesterday I decided to fill our Kia Venga 1.4 petrol with shell v max fuel to see if I could notice any difference.

Actually, after a few miles (probably needed to get the new fuel into the engine) the answer was a definite yes!

The engine is much more responsive on the shell v max. In terms of more max power, I dont know. It is the low down pick up where the difference is felt. Its not surprising really when you think about it. Years ago when your engines ignition timing was pretty much fixed, if you ran a lower octane fuel you would be able to hear the engine pinking under load. Pinking is really bad for an engine, if left unchecked would eventually cause the engine to self destruct. So you either filled up with an higher octane fuel or retarded the ignition timing. Retarded ignition will loose you power.

Modern engines have knock (or pinking) sensors fitted. As soon as one of these sensors picks up on any pinking, the ECU will automatically back off the ignition timing to the point where pinking stops, and magically moves it back when the engine has stopped trying to self destruct.
All this happens within a split second, and the driver will be totally unaware of it.

So, what does this mean exactly? Well if you fill up on a fuel with a lower octane, or a fuel that has a tendency to cause pinking, your engines ECU will be retarding the ignition quite a lot, which will make your car a little more sluggish. Fill up with an higher octane fuel, or one with less tendency to cause pinking and your ECU doesn't need to back off the ignition timing so your car should feel more responsive. You will feel it most on low revs pick up. The pick up in general should feel more responsive, which is exactly how my Kia feels running on the Shell V Max. This in turn should in theory give me more miles per gallon, simply because I don't need to be as heavy on the throttle to keep up with traffic.

However, is it worth the extra cost? Does it balance itself out? I don't know. Our Kia feels so much nicer to drive on the Shell V max, but can i justify the extra cost? Fortunately for me, the Kia is used for my work, so my fuel is a tax deductible expense.

Will supermarket fuel damage anyone's engine? A definite no! By law, all fuels must meet standards. So using supermarket fuel will not do any damage.

Someone compared premium brand cornflakes to supermarkets own label brand. Both are cornflakes, but i can tell the difference!

johnnyb44 · 15th September 2020, 06:48

I notice that using premium fuel over supermarket diesel the car engine sounds more refined. It somehow has a more mutted tone to it overall. The performance is slightly better (hardly noticeable in real road conditions)

Avulon · 16th September 2020, 10:36

Quote:

Originally Posted by Mike Noc

Yes I do, but not that often - over the years a total of 3 bottles of Forte injector cleaner.

Thanks Mike, I thought that would be the case. 3 Bottles doesn't sound bad though.

Phil th Barrow · 19th September 2020, 08:31

Iv used a very cheap supermarket diesel fuel in th 75 for ten years on and off, and it sounded and run not as smoothly. After many conversations with "colleagues" i used ordinary Esso diesel with red ex and it was a nice improvement sound wise and performance.

Lately in 2 different higher performance petrol engines one turbo and one normally asperated i got better pull and fuel economy. Iv used Tesco 98 ron and Jet ultra in both and found jet th best by a smidge on fuel consumption on both engines. Surprisingly i found th best result was 4.6 extra MPG on th normally aspirated engine using Jet ultra.. I never use 95 ron now. I know this isnt scientific but im convinced on performance engines it does make a difference.

14th September 2020, 19:54	#21
Parker This is my second home Jaguar XJ 3.0 V6 Auto (X350) & Hyundai Tuscon 2020 Join Date: Oct 2008 Location: Bridgend Posts: 10,342 Thanks: 69 Thanked 559 Times in 356 Posts	https://blog.greenflag.com/2019/cheap-supermarket-fuel/ Worth a read keep the thread going __________________ http://www.the75andztclub.co.uk/foru...a585a72d1c.jpg "The only thing to do with good advice is pass it on. It is never any use to oneself" SOME VERY USEFUL LINKS SIMPLE DOOR MIRROR REPAIR FITTING CROFT DOOR FINISHERS FORUM RULES CLUB SHOP

15th September 2020, 04:23	#23
Mike Trident Posted a thing or two Rover 75 CDTi Saloon & Citroen C1 Join Date: Jun 2016 Location: Oakenshaw, Near Bradford Posts: 1,622 Thanks: 385 Thanked 552 Times in 328 Posts	Yesterday I decided to fill our Kia Venga 1.4 petrol with shell v max fuel to see if I could notice any difference. Actually, after a few miles (probably needed to get the new fuel into the engine) the answer was a definite yes! The engine is much more responsive on the shell v max. In terms of more max power, I dont know. It is the low down pick up where the difference is felt. Its not surprising really when you think about it. Years ago when your engines ignition timing was pretty much fixed, if you ran a lower octane fuel you would be able to hear the engine pinking under load. Pinking is really bad for an engine, if left unchecked would eventually cause the engine to self destruct. So you either filled up with an higher octane fuel or retarded the ignition timing. Retarded ignition will loose you power. Modern engines have knock (or pinking) sensors fitted. As soon as one of these sensors picks up on any pinking, the ECU will automatically back off the ignition timing to the point where pinking stops, and magically moves it back when the engine has stopped trying to self destruct. All this happens within a split second, and the driver will be totally unaware of it. So, what does this mean exactly? Well if you fill up on a fuel with a lower octane, or a fuel that has a tendency to cause pinking, your engines ECU will be retarding the ignition quite a lot, which will make your car a little more sluggish. Fill up with an higher octane fuel, or one with less tendency to cause pinking and your ECU doesn't need to back off the ignition timing so your car should feel more responsive. You will feel it most on low revs pick up. The pick up in general should feel more responsive, which is exactly how my Kia feels running on the Shell V Max. This in turn should in theory give me more miles per gallon, simply because I don't need to be as heavy on the throttle to keep up with traffic. However, is it worth the extra cost? Does it balance itself out? I don't know. Our Kia feels so much nicer to drive on the Shell V max, but can i justify the extra cost? Fortunately for me, the Kia is used for my work, so my fuel is a tax deductible expense. Will supermarket fuel damage anyone's engine? A definite no! By law, all fuels must meet standards. So using supermarket fuel will not do any damage. Someone compared premium brand cornflakes to supermarkets own label brand. Both are cornflakes, but i can tell the difference! __________________ Rover 75 2.0 CDTi (131Ps) Conn SE Saloon. (Manual) 160 Remap, cruise control, electric window blind, temp gauge, Real walnut / ZT interior, FBH with GSM control. BORN Tuesday, 5th October 2004 @ 12:35:52 This vehicle was the 104,679th 75 to run off the production line, out of 112,381 This vehicle was the 3,318th 75 CDT Connoisseur SE (135) to be made out of 4,744 This vehicle was the 12,440th 75 in Starlight Silver (code: MBB) to be made out of 14,280 Starlight Silver 75s

15th September 2020, 06:48	#24
johnnyb44 I really should get out more....... Rover 75 Join Date: Sep 2013 Location: north wales Posts: 2,705 Thanks: 1,774 Thanked 902 Times in 507 Posts	I notice that using premium fuel over supermarket diesel the car engine sounds more refined. It somehow has a more mutted tone to it overall. The performance is slightly better (hardly noticeable in real road conditions) __________________ Replaced pcv filter, springs, plenum spy hole mod,Bonnet cable divider mod. Wax oiled.Air con recharged. Auto box oil changed , Jules plenum guard fitted .Smoked wind deflectors fitted.S/S Compensator.Club Grill Badge kindly donated by Andyg2011..

19th September 2020, 08:31	#26
Phil th Barrow Gets stuck in " NOW SOLD" :-( Rover 75 Conni Auto SE Join Date: Feb 2011 Location: Stoke Posts: 896 Thanks: 424 Thanked 214 Times in 163 Posts	Iv used a very cheap supermarket diesel fuel in th 75 for ten years on and off, and it sounded and run not as smoothly. After many conversations with "colleagues" i used ordinary Esso diesel with red ex and it was a nice improvement sound wise and performance. Lately in 2 different higher performance petrol engines one turbo and one normally asperated i got better pull and fuel economy. Iv used Tesco 98 ron and Jet ultra in both and found jet th best by a smidge on fuel consumption on both engines. Surprisingly i found th best result was 4.6 extra MPG on th normally aspirated engine using Jet ultra.. I never use 95 ron now. I know this isnt scientific but im convinced on performance engines it does make a difference. __________________ [SIGPIC][/SIGPIC]

14th September 2020, 21:36	#22
Ched I really should get out more....... MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011 Location: Romsey Posts: 2,293 Thanks: 553 Thanked 573 Times in 385 Posts	My last zt190 threw up on different occasions the eml light, plugging the code reader in threw up two fault codes, both banks were running lean, the car was running on asda fuel. I then decided to try shell unleaded, the first tankful gave me 50 more miles out of it over the asda stuff, replicated on every tank fill afterwards, my journey to work was a 264 mile round trip, and never again did the eml light come on. I now run a derv zt and I currently do a 202 mile round trip to work, I use either tesco or shell fuel, and I do get a better mpg from shell fuel. I did run the car on asda fuel when I first had it, since I stopped using it the car seems more responsive and certainly doesn't smoke on acceleration and I get a better miles to tank range.