Definetly guys. There is no absolute truth in oils and each company makes their own standards... It's much more a "pick a starting point and then move on from there with what you feel" kind of thing. Stick to the same brand and move around with 5wt increments. If you pay any attention to your cars handling while driving, you will feel a difference. If you are racing on a relatively smooth course, 35/30 could be a good starting point. Personally, I always run a bit heavier in the front., (30 rear 35 front for example), but our tracks are definetly wa world appart from brittish tracks, so whatever works for you...
