This was taken from the internet, so it's got to be true:
Mike Riley, Product Design Engineer with Ford Motor Company:
Quote: "Moving to 5w20 was driven by ... CAFE requirements. The company believes the switch to lighter viscosity 5w20 oils will reduce carbon dioxide emissions by 190,000 metric tons a year and reduce US fuel consumption by over 21,000,000 gallons a year."
While most people understand the main function of oil is to protect the engine, Ford's only concern in that respect is that the engine survives the warranty period. I especially appreciate Scott Whiteheads insight on this topic. He worked for Ford testing different oils in modular engines and here is what he had to say:
Scott Whitehead - Engine Development Systems Engineer, Ford Motor Company:
Quote: "I've seen the dyno testing. I've probably looked at several hundred engines disassembled and spread out on inspection tables. And I've been involved in testing to resolve issues where varying the oil viscosity was part of the test. Please do not put 5w-20 or less into a mod motor. Please. This is especially true in 4v motors. 5W-30 is probably a good oil for the street with mixed temperatures."
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
... [Read Article]
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