oil issues need help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blown&0chevelle · 02-20-2015, 05:59 PM

I have an issue and I think it was my fault. I recently bought a 69 c10 with a higher mileage 350 in it. after getting it I changed the oil to 5w-30 synthetic. Shortly after I got a rear main seal leak. I had just replaced the rear main seal. And the oil has again found its way out. It only starts leaking once engine is all warmed up. So my question would be. should I have a thicker oil? if so what should I go with and should I go back to conventional oil as well?

Thanks. Kyle

02-20-2015, 05:59 PM	#1
blown&0chevelle Registered User Join Date: Jan 2015 Location: abbotsford Posts: 39	oil issues need help I have an issue and I think it was my fault. I recently bought a 69 c10 with a higher mileage 350 in it. after getting it I changed the oil to 5w-30 synthetic. Shortly after I got a rear main seal leak. I had just replaced the rear main seal. And the oil has again found its way out. It only starts leaking once engine is all warmed up. So my question would be. should I have a thicker oil? if so what should I go with and should I go back to conventional oil as well? Thanks. Kyle



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