Question about 1987 Ford Ranger
In th 80's manufacturers changed from using 10W30 to 5W30 as a recommendation for engine oil. Your truck would likely have enough mileage on it by now that you should consider moving up to a 10W30 or 10W40. Mileage in the area of 250,000 or more could probably handle 20W50 in the summer without problems, but at least 15W40.
If the truck is in good shape, body and mechanical, and not using a lot of oil then a shift to synthetic may prove to be a wise idea. It does cost more but needs to be changed less often and will extend the life of the engine. At least 10W30 would be a good place to start with synthetic.
A good investment would be to purchase an after market oil pressure gauge so you can see what your engine is doing. They are easily installed. Pressure should be in the 30PSI range and this would give you a better idea if the new oil is doing it's job. Hope this helps.
Posted on Aug 07, 2010
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Posted on Jan 02, 2017
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