...as in Delo, LongLife, Rotella, etc.

100% Synthetic Amsoil AME 15W-40 is easily a 15,000 mile oil in these cars: just remember to change out the filter at 7,500, at the very least.

I change my filter every 5K, top off & I'm good to go!

Cheers!

__________________
'91 420 SEL @ 199K, '92 SVX @ 181K, '93 SC400 @ 86K, '93 Kaw ZX-11 @ 30K, '87 F250 @ 181K , 2001 Valkyrie Interstate @ 6K, Y2K Honda NightHawk 250 with 1.5K, '88 420SEL I.@ 179K & the 2nd latest, an '88 420SEL II.@ 210K runnin' parts car, '85 F150 300/NP435