That's it! GI Joes has a Mother's Day Coupon 25% off any 2 REGULARLY PRICED items: 2 gallons of Amsoil AME 15W-40 for $24.95 each - 25% = $18.71 per gallon = $4.68 per quart.
Twice the normal Mercedes 7,500 OCI means an estimated 10 quarts (8 normal fill & 2 additional to topoff & after 7,500 filter change) + 2 HENGST filters @ $6.36 delivered ea = $46.80 + 12.72 TOTALS $59.52
VERSUS
3 X 5K oil changes with Delo 15W-40 = 6 gallons at sales price of $5.99 per (say $36) + 3 oil filters ($19.08) TOTALS $55.08
$4.50 additional to use Amsoil for 15K sounds like a good way to go, eh? I have oil and filters stockpiled to last me for the next 45K miles.
Cheers!
Cheers!