Tesco & Fuel...

I always run my focus ST on momentum 99, there is no noticeable improvement in MPG or performance, although I'm sure it makes more lovely popping noises on the overrun :D
 
Theophany said:
I'd argue that if you're driving 30 miles on reserve tank, that argument for using premium fuels is null and void given you've likely already dragged a load of sediment and other crap through the injectors.
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Yeah it's mad. Good that the fuel pump pickup moves up and down with the fuel level....

Oh no, it doesn't.
 
That's pretty shocking. I've seen in the bottom of plenty of tanks now and they are always squeaky clean. Even the one in my black colt which had a hole in the filler neck in the wheel arch for a while!

Good job even if there are filings in it that it's filtered twice before it sees the injectors anyway.
 
first world problems for the OP.



in other news, the tesco fuel deal they have going on is excellent.

spend £50 and get 2p off per litre over the month, im looking at 15p off per litre for the end of this month :)

and you dont have to spend the £50 in one go, it accumilates over multiple shops.
 
Does that mean the end to the ridiculous voucher discounts they used to do? The only thing I ever buy from Tesco is Momentum99 so sucks for me.
 
Theophany said:
I'd argue that if you're driving 30 miles on reserve tank, that argument for using premium fuels is null and void given you've likely already dragged a load of sediment and other crap through the injectors.
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Aside from the points of the fuel feed taking from the very bottom of the tank (and oils typically float on the top, therefore the crap goes in first) ...
...fuel filter says hello?
 
The filters will only work to certain size particles as any mechanical filter only can, also things in solution that then go onto to burn funny will soon poison a cat.

Once you fill a filter mesh and potentially fuel starvation at high load (being as systems now are becoming non return) you can start damaging those high pressure direct injection pumps. My MINI light comes on at 60 range and handbook suggests no lower than 30miles when you refuel. I assume to help protect the pump!?
 
Clarkey said:
Non return, why? Never heard of that tbh.
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And? Your not Richard Parry jones are you? :p

It's on petrols as they don't need coolers like diesels. Just saves cost of a line, fuel pressure is regulated by the pump and a reduced vapour leakage path with less heat taken back to the tank, helps for PZEV in many US states. Honda k20 is an early application of it I can think of.
 
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Simon said:
Anyone with direct injection should use decent fuels. High octane ideally but even avoiding supermarket stuff is worth doing.

Direct injection systems can suffer from deposits significantly affecting performance/ emissions and fuel economy.
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Indeed, I would have thought more people were aware of this after the issues with the Mitsubishi 4G GDi engines getting coked up to **** on lower octane fuel :(
 
Jonnycoupe said:
My MINI light comes on at 60 range and handbook suggests no lower than 30miles when you refuel. I assume to help protect the pump!?
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Also to stop people calling the free Mini call out service when they stop on the hard shoulder with no fuel? That last estimated range can't be that accurate?
And to stop a lot of bad press in general 'Minis dying by road side in new epidemic'

It's just not safe to take any car right into the fuel light red zone?
 
tigerstyle said:
Also to stop people calling the free Mini call out service when they stop on the hard shoulder with no fuel? That last estimated range can't be that accurate?
And to stop a lot of bad press in general 'Minis dying by road side in new epidemic'

It's just not safe to take any car right into the fuel light red zone?
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Diesel range rovers shut down if the fuel gets too low to save the pump running dry. Wouldn't surprise me if similar strategies exist for direct injection gasolines
 
86JR said:
http://www.audi-sport.net/vb/a3-s3-...me-build-thread-big-turbo-26.html#post2141107

http://www.audi-sport.net/vb/a3-s3-...me-build-thread-big-turbo-26.html#post2141121

Run on Shell vpower from purchase. Makes no difference.
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What does the non V power look like?

Engine oil has a big effect on deposits (introduced by blow by). So it's very important to design a good breather system too.

As for fuel, it has less of an effect but does certainly affect deposits in a controlled test. Vpower may be no cleaner than normal shell, not aware of the additives they use (May just be higher octane). Although the latest nitro stuff apparently has more nitrogen dispersants to help with DI deposits. The UK fuel uses a national fuel pool so the only difference between many fuels is the additive systems (and level of additive)

For more proof I would await next generation fuel from another oil major.
 
On the topic of 98 vs 95 (Again) does 98 i.e Shell V power help clean out injectors and keep them clean?

My old 182 as Diagros is getting on now no the tooth but still running well so ive been told, cambelt has just been changed and good for another 75k miles or to take it to 215,000 (yeah right!!!) so I was wondering about those cleaning type fluids additives for valve cleaning etc...

Are there any decent ones out there, that could be put in every 5,000 miles or so? I literally know nothing about them except that by putting in 98 fuel it acts as a slight cleaner due to the extra additives they put into it.
 
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