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So then what is considered cold enough to warrant 5w-30 over 10w-30? Here in western NC the temperatures could range anywhere from the single digits in the winter to mid 90's in the summer. I know this isn't very cold compared to some places up north but is a lot colder than places like south...

Thanks guys. I think ill extend the oci to one year and just keep with synthetic since the 11 quarts of synthetic needed for both vehicles really isnt that much more than conventional, especially if it is spread out over a year. I assume 10w-30 is preferred over 5w-30 for these motors? I ask...

I currently have a 1986 f150 with a fuel injected 302 and a 1955 Willis CJ-5 that are essentially garage queens. At the most the truck is driven 4000 miles every year and the jeep maybe 2500. Both engines have been recently rebuilt and do not use any oil. I use synthetic in both and a Mobil 1...

Thanks for all the help guys. Ill go by the auto parts tomorrow and get the filter and gasket and drain the convertor and pan, change the filter and put everything back together and fill with a quality fluid. One last question though. I crawled under the truck when I had a spare minute today at...

I have always driven manual transmissions but I recently purchased a 1990 f150 with a 351 and an automatic transmission. I will probably be changing the transmission fluid in a day or two, which is something I have never done before. Could anyone advise me on a good atf for this vehicle? I dont...

Thanks for all the help guys. I think I will just keep running a 10w-30 synthetic and not fret too much about the zddp content, at least untill it starts burning oil. Then I might switch to a heavier diesel dino oil. I really like this site. So much to learn, so little time.

Oh I almost forgot. Temperatures where I am range from single digits in the mountains in winter to 100+ in Raleigh in the summer.

This is my very first post on BITOG but I have been reading for a while now. I will be leaving for college in a few weeks and driving my 1986 f150. From my home in western NC to Raleigh, it is about 270 miles and I will be making this trip down and back about twice a month. My truck is in very...