When we went from Mobil 1 to Chevron Supreme Synthetic for part of a fleet operation but we needed a 5w-20 that Chevron did not supply in CSS and after a bit of testing choose Motorcraft. But in the process we tested a bunch of 5w-20's over a 6 month period in high mileage per month vehicles. Again these tests are a bit unfair in bitog terms because the oil is getting changed at warranty intervals. At least a fair amount of these vehicles where involved in a lot of stop-and-go driving. Well, Lucas was in the loop because we have a lot of racers in the shop. From those guys you'd thing Lucas oil would win the day. They talked about it like the advertising, proof that Lucas is wining the marketing wars as is Mobil 1, without reguard to what really in the bottle. Motorcraft 5w-20 was the pick and would still be the pick even if you ignored the price. We ran a lot of numbers based on the snitch chip info and built a computer model that represented mileage, wear numbers, severity of operation, vehicle info, and product cost. We are turning this model into a data engine that will rate the performance of given components in a vehicle system on a running basis with a percentage of accuracy number. I'm trying to take some of this work public as in a for-profit business but my requests are falling on deaf ears.