schaeffer oil, which one?

[gomer pyle]

Thinking about switching to schaeffer oil. Don't know which to run 7000 or 9000. Also, anyone use schaeffer fuel additive?

[rufushusky]

Schaeffer's makes a very good, somewhat pricey, product. Either the 15w40 or the 5w40 will serve you well, you could run the 15w40 in the summer and 5w40 in the winter. IMHO the 15w40 is probably more than enough to take care of you year round.

I have no experience with their fuel additive so I can not comment.

[gomer pyle]

Anyone else? How many miles between oil changes?

[bruce51d]

9000 5/40, i know bean sells it. i try to change mine every 6-7k but i think you could go out to 10k

[jesilvas]

I knew you'd be here Bruce.
Since you are, what's the diff in the 7k and 9k? Is it just their brand name of syn. vs. non syn.?

[bruce51d]

9k is full syn, 7k is blended

[rufushusky]

Originally Posted by jesilvas

I knew you'd be here Bruce.
Since you are, what's the diff in the 7k and 9k? Is it just their brand name of syn. vs. non syn.?

The 7000 is a 15w40 synthetic blend, the 9000 is a 5w40 PAO based synthetic. Both brands come in other grades but these seem to be the most popular among diesel.

Schaeffer Oil | Supreme 9000 Full Synthetic Heavy Duty Engine Oil

http://www.schaefferoil.com/cmss_fil...Sheets/700.pdf


In a heathly running 7.3 (with UOAs) you should have no problem running 10k intervals at least with this oil IMHO.