Hey guys,
I want to start by asking suggestions on what oil might be best for my car. I have a 1969 Pontiac LeMans. The car has a Pontiac 350 with large valve 400 heads and and aftermarket cam. The motor that it has was rebuilt by my father about 12-15 years ago, and has no more than 9000 miles on it. The heads have been freshly redone, so they need to be broke in. The guy that put the 8000 ish miles on the motor probably used the cheapest oil he could get and might have changed the oil once or twice...
I currently use Castrol GTX convention 10W-40, about to switch to 10W-30 for the winter. I also use a quart of Lucas oil stabilizer each oil change as I find that this has smoothed up my motors in the past. My main area of concern is that these motors were made with the oils in the day that has high levels of ZDDP. I am concerned that I need to add more ZDDP to allow my engine to lubricate properly and wear correctly. Being an engineer I also wonder about how the new Boron compounds compare to the ZDDP that it has replaced.
Any input would be highly appreciated!
I want to start by asking suggestions on what oil might be best for my car. I have a 1969 Pontiac LeMans. The car has a Pontiac 350 with large valve 400 heads and and aftermarket cam. The motor that it has was rebuilt by my father about 12-15 years ago, and has no more than 9000 miles on it. The heads have been freshly redone, so they need to be broke in. The guy that put the 8000 ish miles on the motor probably used the cheapest oil he could get and might have changed the oil once or twice...
I currently use Castrol GTX convention 10W-40, about to switch to 10W-30 for the winter. I also use a quart of Lucas oil stabilizer each oil change as I find that this has smoothed up my motors in the past. My main area of concern is that these motors were made with the oils in the day that has high levels of ZDDP. I am concerned that I need to add more ZDDP to allow my engine to lubricate properly and wear correctly. Being an engineer I also wonder about how the new Boron compounds compare to the ZDDP that it has replaced.
Any input would be highly appreciated!