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Joined: Fri Nov 10th, 2017
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I consider city driving a harsh environment type of driving. Towing or carrying 200+ lbs down the highway is harsh environment as well a 100+ temps and dusty conditions. So I change my oil on a more frequent basis.
In the operator's or maintenance manual lists the recommended oil change interval. Always use the recommended weight of oil.
There are 3 different types of oil. The cheaper oil made out of crude oil. The pricey full synthetic. And the mix of the two the semi-synthetic blend. The full synthetic usually has more detergents with anti varnish properties.
I change my own oil and I know the history of the truck since it had 60k miles on it. I have used Mobile1 since then. I also buy Motorcraft oil filters in a 10 pack for better pricing. I change the oil every 5k because I consider my type of driving extreme condition. If I were to go across country not carry a load I would stretch it out to a 8k-10k changing out the filter at 5k.
With a 10 mile commute as long as it was not stop and go I would consider that easy miles/normal duty. If I picked a "new to me" truck that had an unknown service history and oil that had more than 100k on it, I would use regular dino oil. I would also change it every 3300 miles (3 times every 10k).
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Tony
NE ATL
'04 XLT regular cab 3.slo stepside
Semi retirement