Originally posted by Levi
Mazsport has fucked up many cars that I know of, and he ripps you off. Or he ripped me off, and 2 of my friends.
Ask Yanni about Scoot and what he did to him..Just stay away.
I would use the Motorcraft 5-20 just as they recommend, just make sure its dino oil and not synthetic. The reason I say use the weight recommended is the factoory designs the engine with enough clearance for that specific weight of oil, if you went to 30 weight, it would not fit in betweeen the bearings and cause unnessary wear all the time.This is called a Plastiguage.and allows for oil clearance on bearings etc
always remember a lite weight oil lubricates better than heavy weights, beccuase more oil is able to go over the surfaces @ a much dfaster speed and thus taking out the heat which leads top friction and oil break down.
I change the oil in my RX7 every 800 miles, It is almost the same color as went in, and I have over 300,000 on the engine and it doesn't smoke or anything. and it currentylty runs 14.2 on street tires and is the fastest S4 N/A RX7 in the entire bay area.
I am not a real BIG rotary fan but i do know my way around them and have built a few , I know scott and have seen his work he does awsome quality work , changing you oil every 800miles is just retarted it wastes money , and further more "plastigauge" is is used for measuring oil clearences when building a motor "do you do this on the daily basis?" , the factory sets there oil clearences kinda lean so a wide variety of oil can be used , and they set a oil that would be used on the daily basis in a average driving condition , if you race me and the rest of the planet will probaly back me saying that a thicker oil should be used , I have nothing against synthetic but i like dino oil castrol gtx 20/50 when you beat on a motor it creates alot of heat and I have been to seminars where they have tested alot of different oils at all different temps , rpm and oil pressure , thinner weights tend to make more power when cold and a normal driving conditions but when the heat is on at long periods of high rpm they break down and loose all and I mean ALL viscosity and turn to the thinnest shitty oil you have ever seen , thicker oils tend to hold togeather longer and thin out to what a 5 or 10 weight would be when they are hot so it really all depends on how you will be driving the car.
oil weight also depends on you oil system hvlp (high volume low pressure) or hplv (high pressure low volume)