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normal chinese petrol is 93, and most chinese market cars are specced to run on this.
97 is reasonably easy to get hold of in big cities, but you can't always get it on motorway service stations. It's about 10% more expensive.
98 is rare, but there are certainly places to get it in shanghai, but unfortunately not close to the race track. It's another 10% on top.
generally the spec of chinese fuel isn't well regulated which causes problems. they use a lot of MMT as an octane increasing additive, which contains manganese and blocks Catalytic converters, increases wear of valvegear and pistons, and forms electrically conductive deposits on the spark plugs. I think it may also do something to your brain, which is why it is banned in many countries.
i keep reading that shell and bp are going to build filling stations, but they keep not appearing. I have seen a few SK ones (Korean). the biggest problem with Chinese filling stations is that they don't sell pies.
chinadragon racing now have a shop at the track, and he sells octane booster additive. I usually use 97 Ron and that's what I set the car up on, mainly because the 98 shop is not on my normal commute.
The problem I guess you have with the saab, which I had when I was using efi, is that if you optimise the timing for high grade fuel, which gives a small but useful increase in power, when you switch back to low grade you get close to knocking sometimes, and the ecu/ knock sensor sees this and makes a huge retardation of ignition to protect the engine, and this robs a lot of power. with a clever ecu it will remember the problem, and even after you go back to good fuel it might take a couple of days to gradually return to the optimum timing.
97 is reasonably easy to get hold of in big cities, but you can't always get it on motorway service stations. It's about 10% more expensive.
98 is rare, but there are certainly places to get it in shanghai, but unfortunately not close to the race track. It's another 10% on top.
generally the spec of chinese fuel isn't well regulated which causes problems. they use a lot of MMT as an octane increasing additive, which contains manganese and blocks Catalytic converters, increases wear of valvegear and pistons, and forms electrically conductive deposits on the spark plugs. I think it may also do something to your brain, which is why it is banned in many countries.
i keep reading that shell and bp are going to build filling stations, but they keep not appearing. I have seen a few SK ones (Korean). the biggest problem with Chinese filling stations is that they don't sell pies.
chinadragon racing now have a shop at the track, and he sells octane booster additive. I usually use 97 Ron and that's what I set the car up on, mainly because the 98 shop is not on my normal commute.
The problem I guess you have with the saab, which I had when I was using efi, is that if you optimise the timing for high grade fuel, which gives a small but useful increase in power, when you switch back to low grade you get close to knocking sometimes, and the ecu/ knock sensor sees this and makes a huge retardation of ignition to protect the engine, and this robs a lot of power. with a clever ecu it will remember the problem, and even after you go back to good fuel it might take a couple of days to gradually return to the optimum timing.