Fair enough. Thanks for the welcome. OK, my description of "thick" was not right, but I understand the concept quite well. I've come from a circuit racing background in a GTR, hence why I questioned the 15W40 as I've always run 0's and 5's - that was the point I as trting to make. Great to be on board and I'll try to post a couple of pic's of the car soon. Thanks for the advice. Cheers.