Oil??

I have used every oil known to man and with that being said ,i have my mind made up TO WHATS BEST.
AND ALSO A LITTLE TOO MUCH TIME ON MY HANDS TOO WRITE THIS.

All motor oil is good ,but not when it's dirty,so change it by how it looks and not by the mileage.Every engine dosen't have the same ring seal ,and some engines make the motor oil dirty faster then others.
2)I choose the right grade for what i feel the engine is going to be used for
like racing,long trips or trying to make the most horse power.
THIN OIL MAKES MORE HORSE POWER BUT LOWER OIL PRESSURE.THICK OIL GIVES BETTER PROTECTION AND HIGHER OIL PRESSURE.
3)I always use two additives (marvel mystery oil and lucas)
I have taken motors apart that have had marvil in them since they were new and they were perfectly clean ,and believe it or not ,the crank and rod bearings looked polished.((very clean))
Lucas oil stays on the engine parts so you don't have any dry starts ,and helps give good oil presure when hot.
4)synthetic is good for faster oil presure on start up,and it's very strong film wise .Natural oil is good for the seals and is very cheap so you could change it three to one cost wise.I think mixing the two is the best way to go.
Right now i have quaker state 10w40 in both my cars with marvil and lucas.
The quaker state was $9.50 for a 5 quart jug.{wall mart}:burnout:

ps for a good zink oil i have used valvoline racing.
and lucas break in oil at start up.My first three oil changes for my new motor were valvoline racing.