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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Modern oils will be fine, you really only run into trouble if you replace the cam/lifters or are running a race type camshaft with high spring pressures. You really don't ned the addative, from what I read about it, it only increases the viscosity. Best bet would be to bump up to 10w-30 if you need a heavier oil.
Bill Burmeister
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