Petrol quality makes no difference to intake port carbon build upI dont notice any difference between 95 vs 99 on my 2.0 TFSI but i always use 99 because it's supposedly better for keeping the engine clean. (FSI is direct injection into the cylinder so if it doesnt burn clean the exhaust recirculation will deposit gunk on the intake ports. It doesnt have the injected fuel going through the intake ports to keep it clean like most engines.)
Petrol quality makes no difference to intake port carbon build up![]()
Petrol quality makes no difference to intake port carbon build up![]()
Petrol quality makes no difference to intake port carbon build up![]()
I've had 95RON put in N54 (two turbos), N55 (twin-scroll turbo) and highly modified 2zz-ge (supercharged) engines for months, and then months on Shell vPower (Nitro), all I noticed was 1-2MPG more. Nothing else at all.
Branded 95RON from the oil majors is usually better than minimal additive supermarket fuels.
See this mentioned a lot, any evidence though?
See this mentioned a lot, any evidence though?
Not in the public domain no![]()
You'd have thought given the multi billion dollar petroleum industry that the fuel companies would be shouting it from the roof tops if it was true. Rather than dubious marketing strategies.
It'd be very easy to run two engines on a test bed and compare the intake valves of one on premium fuel and one on boggo fuel, yet I've never seen the pics.
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.
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.
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.