IceMan Posted October 3, 2004 Share Posted October 3, 2004 There's an article in the Sunday Times Motoring section today saying that BP Ultimate and Optimax aren't much better than normal fuels. They got Superchips to test a gallon of each and found that they only got a 1bhp improvement at high revs in one test. They couldn't confirm whether the fuels were good for engine cleaning due to the short-term nature of the test however. The main reason was that modern engines electronics adjust for the fuel type but don't do much better when better fuel is added. Of course this test doesn't mention Japanese imports that are made for 100+octane fuel... I'm guessing that UK produced cars would be optimised for the 95octane level. Still I always thought that the claims of making a 1.8l feel like a 2.0l engine were a little off! Ice Link to comment Share on other sites More sharing options...
Syed Shah Posted October 3, 2004 Share Posted October 3, 2004 The Sunday Times test was complete rubbish, pay it no attention. Optimax/Premium fuel makes a small difference on stock NAs and TTs, but it becomes fully required when the boost is upped on a TT, I guess it would also help and NA on the spray. You should reset the ECu when running it for the first time to speed up any benefits. Link to comment Share on other sites More sharing options...
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