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Discussion Boards > Active Subjects > Messages as Posted > Chevy Pickup Trucks Forum

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12-14-2004, 15:53

Post: 102239

bmlekki

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Oil for 83 GMC 305

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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12-15-2004, 09:21

Post: 102278

bmlekki

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Oil for 83 GMC 305

any ideas?

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12-15-2004, 09:44

Post: 102281

AV8R

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Oil for 83 GMC 305

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

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12-15-2004, 09:47

Post: 102282

DRankin

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Oil for 83 GMC 305

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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12-15-2004, 09:51

Post: 102284

kwschumm

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Oil for 83 GMC 305

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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12-15-2004, 12:49

Post: 102294

bmlekki

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Oil for 83 GMC 305

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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Discussion Boards > Active Subjects > Messages as Posted > Chevy Pickup Trucks Forum

Thread 102239 Filter by Poster:
AV8R 1 | bmlekki 3 | DRankin 1 | kwschumm 1 |

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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

any ideas?

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

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.

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.

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

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

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