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**'68OrangeSunshine** · 10-29-2015, 09:03 PM

I was anal about oil changes [ w/ Valvoline 30 weight Racing] at 2000 miles with a 292 bored .030 over in my '68 C/10 Stepside. I got 250,000 miles out of it in 25 years before I had to rebuild.
I haven't pulled an 'autopsy' on it yet as I had a spare 292 L6 block standing by. But I think it was "lead-foot related". A shop Sun-analysed it and they said I had no action on cylinders 3 and 4 -- the two cylinders closest to the 4 barrel 390 Holley carb on an Offy intake. Possible washdown. Maybe in the future I'll bore it out to .060 over and start again.

10-29-2015, 09:03 PM	#12
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,622	Re: Engine oil...... an interesting story I was anal about oil changes [ w/ Valvoline 30 weight Racing] at 2000 miles with a 292 bored .030 over in my '68 C/10 Stepside. I got 250,000 miles out of it in 25 years before I had to rebuild. I haven't pulled an 'autopsy' on it yet as I had a spare 292 L6 block standing by. But I think it was "lead-foot related". A shop Sun-analysed it and they said I had no action on cylinders 3 and 4 -- the two cylinders closest to the 4 barrel 390 Holley carb on an Offy intake. Possible washdown. Maybe in the future I'll bore it out to .060 over and start again. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.