I have been using thicker than spec oils in some of our cars for the past few years.
The van was the first victim, having seen QS syn 5W-50 and Syntec 5W-50, as well as M1 EP 15W-50, a blend of 2 qts GTX 20W-50 + 3 qts GTX 5W-20, a well as Tection Extra 15W-40.
The Havoline DS 10W-40 in it currently is probably too close to spec to count.
The '97 Accord was on Tection 15W-40 for one run last summer, and is now on M1 EP 15W-50. It has seen PYB 10W-40.
The '99 Accord is now on the same M1 EP 15W-50 it saw last summer. It has also seen PYB 10W-40.
I have never noted any ill effects with the thicker oil, which I only use during warm weather. There doesn't seem to be much loss of fuel economy, either.
Has anyone seen any actual damage caused by the use of thicker than spec oil in warm weather?
The van was the first victim, having seen QS syn 5W-50 and Syntec 5W-50, as well as M1 EP 15W-50, a blend of 2 qts GTX 20W-50 + 3 qts GTX 5W-20, a well as Tection Extra 15W-40.
The Havoline DS 10W-40 in it currently is probably too close to spec to count.
The '97 Accord was on Tection 15W-40 for one run last summer, and is now on M1 EP 15W-50. It has seen PYB 10W-40.
The '99 Accord is now on the same M1 EP 15W-50 it saw last summer. It has also seen PYB 10W-40.
I have never noted any ill effects with the thicker oil, which I only use during warm weather. There doesn't seem to be much loss of fuel economy, either.
Has anyone seen any actual damage caused by the use of thicker than spec oil in warm weather?