i dont think there is a major diffrence between any conventional oil...I SAID MAJOR not that there isnt diffrences!
Wal-Mart Brand oil actually performs very well if it is changed at proper intervals!
The Canadian tire EL CHEAPO Auto Lab 10w30 is what i carry in my trunk as spare, haven't used it on my car yet, but I have helped others out by loaing out a quart or two.
What oil would you recomend for less Paraffin build up? I wasn't aware of this problem with QS...

Lol.. Ive seen that auto lab cr** Just the name of it gives me a mental image of someone straining particles out of used oil, and mixxing it with good oil in a garbage can, then trying to sell it...

Go to Zellers and buy Auto Prix oil!!
Usually goes on sale for 99 Cents a quart!

ROYAL PURPLE,expensive, but, NO wear, COLD starts, BETTER mileage, 3 or 4 HP, and the biggest benefit longevity of an exoensive motor build! Also use in my riding mower and my emergency electrical generator for the house.

Amsoil actually makes a synthetic blend. I know they sell it at fleet farm. It costs about $3-$4 a qt, I don't remember exactly. It'* rated to last 7,000 miles too.
And for argument'* sake, Mobil 1 is the number one "cheap" full syn on the market, it doesn't last any longer than conventional oil does, but it does work better.