I have used mobil8000 and bp ultimate. U need to check the colour of the bp ultimate bcoz it is never the same i have been using ultimate for the past 2 yrs. I have filled up at cab rd bp, horsley dr bp, carington bp, Fairfield BP and all have been different. 1 petrol station could be clear and the other is yellow. I found that the clear one last longer and gives u better performance same goes with the mobil8000 same issue. So before u fill up hope to god that the ulimate or synergy 8000 is clear.