>>R>>> Thought I was going to stay out of the thread but one question and I >>> am out.
>>>
>>> Has anyone sent in a sample of Valvoline or some other non syn oil and
>>> have it tested for usefull life like has been down with the syn oils? >>>
>>> I have always used valvoline and everytime I change it in the 5000
>>> mile range it still seems like it would go a lot longer.
>>>
>>> Ron
I have. I send them to Blackstone. I have a 97 F-250 with a powerstroke and have sent samples in several times,what would you like to know? Jeff