lizzyfan

I use MC 5w30 semi synthetic as I change it often
Great price/Great product

DreamerGT

I run a oil by crisco, its cheap and easy to find.

oxfordgt

I only used royal purple once and $2100 later I had a new engine. My car sat for 4 months while I was out of the country and because I had royal purple in it 5 of the valve seals dry rotted and I burned thru oil so fast that I spun a bearing (less then an hour of driving). Dino oil is to only oil I will ever use now in any of my cars or trucks.

uberstang1

How can you attribute this to running royal purple? Also if it was burning through oil that fast how did you not notice the smell/smoke?

mustangmancp

Im actually probably changing mine when i get home. I use Mobil 1 in mine if i remember correctly...never used royal purple...too damn pricey haha.

Moonshine

That has nothing to do with royal purple.

ddmsgtr1

Since we have a ford tech posting, I might as well ask what the importance in weight is. I forget the reasoning, but I was told that you don't want to run a higher weight than the 5w-20 that ford specs, so that's what I've been using.

natedog

I love when people randomly come in with some horror story about this oil or that one. And in my defense I didn't feel like a tightened the bolt very tight before it popped and was stripped. I guess through all the oil changes over the years it was probably overtightened a few times.

KillJoy

For an 02 mustang, Ford recommends 5w-20 for efficiency and to meet CAFE regulations. You'll hear a lot of people say that beginning in 01, Ford changed the spec from 5-30 to 5-20 because internel engine tolerances changed, but that holds no water.

Both oils will provide the same start up flow and pressure, however after the engine is at temp, the 5-20 will be thinner than the 5-30. 5-30 would be best for high rpm usage because it will hold oil pressure better, I'm talking in the 6k+ range.

In the end, either oil will do for a daily driver that gives the car a few WOT runs.

EDIT: Now, for the 05+ guys, they spec 5-20 not only for the efficiency, but also for the VCT. 5-30 can play games with the VCT, and cause some issues with the cam timing.

72MachOne99GT

boom to you guys..

<<<<<<<this guy doesnt need ramps OR a lift to change his oil..

crawl your *** under there *non lowered guys* and stretch your arm out...mmm..yah!...feel teh scrape on your back as you wrench your body out from under there..