03-04-2010, 04:38 AM
dad@home wrote: If you tow or spend all day at highway speeds put in the 50 weight oil.
There are very few modern cars where 50 weight would make any sense. As said before, go with what the owners manual says.
Also note dad that his car only has 70k miles on it. Despite the age in years, that is not an old engine by any means so changing the oil for that reason would be inappropriate. Also, to whomever suggested that synthetic was a waste on such a car, that's simply not true. Synthetic is far more resistant to sludge formation than regular oil. One of the things that can destroy an old car engine quicker than anything is sludge formation. Also, don't even think about synthetic blends. Full synthetic is the only way to go.