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Oil for 83 GMC 305

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bmlekki
Join Date: Oct 2003
Posts: 185 Upstate, NY
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2004-12-14          102239


Hey guys I have an 83 GMC 1500 with the 305 V-8.

The Guy I bought it from said he put 15-40 through it year round. It gets real cold my way. Any suggestions?
Thanks




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Oil for 83 GMC 305

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bmlekki
Join Date: Oct 2003
Posts: 185 Upstate, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2004-12-15          102278


any ideas? ....


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Oil for 83 GMC 305

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AV8R
Join Date: Oct 2003
Posts: 882 North Central Wisconsin
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2004-12-15          102281


15w-40 is a little heavy. 10w-40 summer, 5w-30 winter I think is what was recomended for these. ....


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Oil for 83 GMC 305

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DRankin
Join Date: Jan 2000
Posts: 5116 Northern Nevada
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2004-12-15          102282


Sounds a little thick to me. Assuming there is no big problem with oil consumption, I think a 10w-30 would help it start better and get better fuel mileage. ....


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Oil for 83 GMC 305

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kwschumm
Join Date: Feb 2003
Posts: 5764 NW Oregon
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2004-12-15          102284


Sometimes guys use thicker oil in an attempt to reduce oil consumption, but it does cause increased wear during cold starts. I'd give 5W-30 a try. ....


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Oil for 83 GMC 305

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bmlekki
Join Date: Oct 2003
Posts: 185 Upstate, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2004-12-15          102294


Thanks Guys, I just wanted to be sure it was still going to build a good pressure and lube it well.
Thanks ....


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