Oil type/use question

[mkassab]

I already own a lot of sync oil… 2 types…

- Castrol Syntec 5W-50

- Red Line 0W-40


For the first several hundred miles, I’m using the Gibbs oil and some 10w-40 oil with Red Line break in additive. Then I’ll drain, hook up my canton oil/filter/accu system and use Shell Rotella (about 15 quarts). Will run that ~12 months.



1. Is there any issue with either of these sync oils for my 427 sbf engine? I’d plan to wait to next year to use. I could wait longer.

2. Should I mix the two sync's above

3. Should I mix Shell Rotella with any of above.

4. If yes to mix… maybe 50-50?



Your advice needed. I don’t want to waste the sync oil I have. I sold a Porsche that used both.



Thanks Mark