Since 15W-50 is so hard to find in Canada wouldn't 5W-50 work just as well?

My basic understanding of motor oils is the first number (5) is related to the viscosity ( ability to flow) when the oil is cold and the Last number (50) is the weight at normal operating temperature.

If thats the case wouldn't 5W-50 oil be a good subsitute, how far off can it be? After all some dealer ships are recommending the switch.

 

5W-50 will work just as well....

I use to run 0 W-30 in my Mustang Race car and had no problems....It actually made a few extra HP on the Dyno....Theory was there was less resistance for the crank to spin in the oil pan...

 

Got me 2 cases of Mobile1 15W-50. It was hard to find so I got lots. It should become easier to acquire soon.

 

Where did you locate Mobil 1 15w50?

 

Warning, potential thread hijack...

After many years of using Mobil 1 at the track, I am going to try Redline, Royal Purple, and Amsoil ths year... My own research and discusions with other racers have made me believe that Mobil 1 isn't as good as it once was...

I will let you guys know my experience at the end of the year...

cheers,
Patrick

 

I got it from a buddy who owns a service/tire dealership. I don't know where he got it but if you want some, I can ask if there is any more.