I have not been a board member long and do not know didly. Therefore, my observations should be taken with a grain of salt. Technarch's recent post about GC http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=004887 made me think about a number of things. Redline is also a thick oil but people do not complain about it preventing an engine from reving. Why? Redline is loaded with moly. Redline is a very "slick oil" even though it is thick. For instance, my Camaro SS has no piston slap and never burned any oil until I used Redline. It used 1 quart during one 3,000 mile run and 1 and 1/2 quarts during another 3,000 mile run. I recently read on another technical board named after the LS1 that ring flutter occurs on the LS1 during down shifting. This causes blow-by. Therefore, a slick oil like Redline would seem to aggrivate the problem. Hence, my consumption problem with Redline. On the other hand GC has no moly and its thickness henders an engine from reving high. Therefore, it would seem that GC would help to reduce oil consumption on cars with wide tolerance. However, on Fords and other cars where the tolorances are narrower this would not be the right oil unless moly was added to it. What do you think of my ignorant observation?