When changing the oil recently in two European cars (Volvo 2.4 NA, VW 1.8T), I've noticed that they both list the typical 30-weight oils (5w-30 for both/10w-30 for Volvo) as primary recommendation. BUT, they also both say that when running hard, towing, etc..., that the use of 40-weight oil (15w-40 and 5w-40 for Volvo...5w-40 for VW) is recommended.
Now looking at American cars and trucks, most require that you use 5w-30 and 10w-30, and say specifically not to use any other weights.
Now I have a hard time believing that the critical interal clearances are any smaller in the US engines than they are in the European engines, and because of this, I'm starting to believe that running a 40-weight oil, especially the 5w-40 synthetics, would be fine for even a new 2003 U.S. car/truck right off the showroom floor.
What do you all think of this?
Thanks,
Justin.
[ May 01, 2003, 06:52 AM: Message edited by: Justin ]
Now looking at American cars and trucks, most require that you use 5w-30 and 10w-30, and say specifically not to use any other weights.
Now I have a hard time believing that the critical interal clearances are any smaller in the US engines than they are in the European engines, and because of this, I'm starting to believe that running a 40-weight oil, especially the 5w-40 synthetics, would be fine for even a new 2003 U.S. car/truck right off the showroom floor.
What do you all think of this?
Thanks,
Justin.
[ May 01, 2003, 06:52 AM: Message edited by: Justin ]