Discussion Starter · #1 ·
What weight do you guys up north recommend using? I'd like to drive my 83 spider till there's snow on the ground then put it up for the season. Thanks!
Good point Elio. I know its an old thread, but since this issue wont go away, might as well add to it......Most important thing in oil, as Elio stated, is something not seen discussed very much, and it is oil FLOW during COLD startup. Everything else is of secondary importance. A cold started engine receives as much wear as driving the car for 500 miles!!!!!!!I don't have any difficulty with what lowmileage is recommending.
I was a controls engineer with Esso/Exxon and did instrument design for VI units and other lube processes. I also asked many, many questions of the PhD chemists that populated the worldwide lube research facility and engine testing areas where I worked.
What I learned is that the oil needs to flow and lube during startup. That is the most important issue.
Yes VI breaks down, but a typical "nothern" Alfista does 3 to 5K miles per year, so not likely an issue.
10W 30 can be light at engine operating temperatures, hence the preference for 10W 40.
15W 40 is good oil, but to my mind the 10 is "better" than 15 low end.
My factory manual for the 85 to 89 Spider lists recommended engine oils ;
SAE SE, API SF: Agip Sint 2000, SAE 10W50; IP Sintiax SAE 10W40; Shell, Super plus Motor Oil 10W50.
These oils are recommended for ambient temp of 0F to 104 F.
You will note ALL like the "10" for the reason I state.
For the nothern climate the 10W40 GTX is the oil, if you prefer 15W40, formulated for diesel service, that's OK too.
Main rules: use "good oil", change frequently, use good filter, put your car away to hibernate with NEW CLEAN oil.
Best regards, Elio