Originally Posted By: KingCake
Originally Posted By: akela
Originally Posted By: CT8
Throw a can of STP in the oil to thicken it up.
I'd rather simply add 0.5..1 quart of 15w40
that's not how viscosity works
akela, there are some great folks here that can explain why that is. Also I believe oil 101 touches on it, - you can also look up a couple of charts to see where the oil's properties would end up, based on mixes with different brands (enter different visc @ temperature).
OP: Backspecced, good to go, save your money.
CONGRATULATIONS on your 280K milestone!
More than a quarter million miles!
Besides routine maintenance, what work have you had to do to her?