I used to use Zellers 10W30 Auto Prix a lot about eight years ago. My 51 Plymouth car was my daily summer driver and it used a lot of oil. At that time it was $3.99 for 4 litres so I liked it. I also used it in my family's pickup truck since it was old and used some oil.
Interestingly, I had a 4L plastic jug of the 10W30 Auto Prix oil in the back of the truck during the summer in the sun. I noticed the jug had the sides bowed out a little. When I opened the cap it hissed, just like opening a gas can on a hot day. Based on that I am guessing it has scary lubricating qualities.
Since then, I rebuilt the 51 Plymouth engine, and a Mitsubishi engine and I used the Auto Prix for the 500km initial break in oil in both engines. Both engines broke in wonderfully and are excellent to this day. I have used conventional Castrol in each engine since the break in.
Since we are talking about Canadian oil, has anyone noticed that the Canadian Walmart Tech2000/Supertech brand conventional oil is unusually thin? If you shake a bottle of Walmart 10W30 it seems thinner than a name brand 5W30. I also bought a few litres of the Walmart 10W30 and checked it out at home, it is thin. I kept buying the Zellers Auto Prix before, because it seemed like more substantial oil than the Walmart oil.
I stocked up on a pile of Canadian Tire Motomaster Supreme 10W30 oil when it was on sale for $1.19 a litre about five years ago. I bought about 10 cases of 12. I still have a few cases left. I used to use it in a car that was good but used oil at the time. I also use it in lawnmowers and for a hydraulic oil in my dad's old tractor (the manual specifies engine oil). It seems like pretty good cheap oil, but it hasn't been on sale lately.
How come Canadian Tire has Supreme, Nugold, Autolab, and others. The bottles are all the same shape. Is the oil really different?
