psneeld
Guru
I wish these threads were read in their entirety. The cost is virtually identical even before figuring a longer duty cycle for the syn. 4 quarts dino $14 vs 5 quarts syn $18. As I had stated in a previous thread when I asked Bob Smith last fall he said he saw no problem with using a syn just didn't see an advantage if it was more expensive (it's not).
Usually the cost between syn and dino is not the same. For Rotella dino $13 for Rotella Syn $22 tmes 4 gallons per engine is almost $40 per change. Even more if you use a pure syn like Mobile 1 that's $50+ per qt sixpack.
But as been said before...for the average boter that's only about $100 per year..but for a long distance cruiser...it could be easily double or triple that.
alormaria - Using a bypass system is ONLY OK if you are having regular oil analysis done..you have to worry about both filtration AND oil chemistry.