Was using Mobil 1 0W-40 back then, yet Mobil seems to have changed the formula and on my last change late in the 2006 season something was indeed different (and not in a positive way). So now have switched to Shell Rotella-T 5W-40 in the blue gallon jug only available at Walmart. It is mainly pushed to diesel guys though fear not, works great in regular cars just fine. Big arse Diesel trucks need strong, durable oil with a certain additive pack that is said to be very good for hard use gassers.Steve, Were you using the 5W-40 on the track when I saw you?
Castrol makes some great oils though that is WAY too thick even for New England 'hot' summer. You can use the 5W-40 year around without fear.I've been running Castrol 20W-50 in my car for street use.
20W-XX (anything) is bad bad bad IMO for your location. Your engine has to fight that thick 20W at start up. i can not recommend a 0W-XX at this time for summer use due to my lack of knowledge of a known good 0W-XX oil.I remember with my Harley I used to adjust the oil by the season to keep the proper pressure. Maybe living in New England running the recommended 20W-50 isn't the right thing to do?
EnjoyI'm due for a change, maybe I'll swing down to Walmart and pick up a case of 5W-40 Shell Rotella.