Canada: Castrol Syntec 18$ a jug
 

23$ (40% off) at CT this week.

Use this 5$ coupon and get it for 18$

CastrolCoupons.pdf

Thanks for this tasdrouille,

I went to a CT store in Waterloo ON and the only Syntec jug deal was $29.95 for 10W-30. My owner's manual says the Bluesmobile requires 5W-20 :(

The other grades were $39.95, but they didn't have 5W-20, so my $5.00 coupon and I went home...

Dang! I just bought 3 jugs last week! I guess I'll have to watch for a sale again before the end of the year.

Bluesfan, 5W30 will work fine in your truck, and 10W30 will be fine in the summer. Thicker oil does decrease mileage slightly but synthetic oil increases mileage plus is a better lubricant, so going from normal 5W20 to 5w30 synthetic won't affect you very much.

Thanks for this IndyIan -- I'll keep it in mind!