For once your right.
People don't take serious the difference 2 or 3% in fuel savings makes to their wallets over the life of a vehicle.
And that is the difference between a fuel conserving engine oil compared to the same viscosity of a non (FM) conserving engine oil.
Now add at least another 3% when using an SAE 50 engine oil in an application where an SAE 30 will do, and your SAE 50 just added a total of 6% to your fuel bill.
Lets say you drive X number of miles per year, your fuel bill is $3,000 per year, and your vehicle lasts 15 years.
How many dollars is a 6% savings going to make?
Compound that at 10% because you put your gasoline purchases on a credit card that has never been fully paid off.
There has to be a balance between engine protection and cost of operation.
Has anyone noticed that Delvac 15W50 for one, is no longer? That is because the added protection of an SAE 50 engine oil came at a 2% increase in fuel costs to the long haul truckers with little added engine life.
So what if your engine lasted forever? You paid for a new one with your added fuel costs, and your still driving a 20 year old vehicle with 600,000 miles on it.
[ November 01, 2003, 06:23 PM: Message edited by: userfriendly ]