Oil Questions

rangerboy101 · Dec 28, 2011

Well I've tried multiple times to get ahold of the previous owner of my car with no success. So my questions are, what oil should I use and how much? This is what I know about the motor from the Craigslist ad:
308
10:1 compression
Trick flow stage 3 cam
Ported and polished gt 40 heads and upper and lower intake
24 lb injectors with matching maf sensor
Cold air intake
Taylor made 10.4mm wires
Msd 6a ignition box

Rick 91GT · Dec 28, 2011

What oil pan is on the motor, that would effect capacity. stock is 5qt, Moroso or Canton aftermarket would be 7qt

Id run a 10w30 personally

rangerboy101 · Dec 28, 2011

How can I tell if the pan is factory or not?

Rick 91GT · Dec 28, 2011

Factory style pans are all just stamped, the aftermarket pans will have a welded on rear section. OR take a pic and I can tell ya

rangerboy101 · Dec 28, 2011

Sounds good. I'll be away from the car for the next few days so I'll check it out the next chance I get.

rangerboy101 · Jan 15, 2012

The oil pan is the factory one. What 10w30 would you recommend me running?

Febreezeit50 · Jan 15, 2012

Any really. Synthetics will be more expensive but cleaner and will last longer in between changes.

rangerboy101 · Jan 15, 2012

Sounds good. I'll probably just run Castrol like I do in my truck.

jsw81 · Jan 15, 2012

rangerboy101 said:
Well I've tried multiple times to get ahold of the previous owner of my car with no success. So my questions are, what oil should I use and how much? This is what I know about the motor from the Craigslist ad:
308
10:1 compression
Trick flow stage 3 cam
Ported and polished gt 40 heads and upper and lower intake
24 lb injectors with matching maf sensor
Cold air intake
Taylor made 10.4mm wires
Msd 6a ignition box

That's a golf club.

rangerboy101 · Jan 15, 2012

LOL I just keep quoting all the stuff about my car from the Craigslist ad.

NIKwoaC · Jan 15, 2012

Like Rick said, start with a 10w30 (or a 5w30), and watch your oil pressure. Depending on how beat up the engine is and how it was rebuilt, it may need a heavier oil if a Xw30 doesnt hold good pressure once warm, but most likely a Xw30 will do you good.

rangerboy101 · Jan 15, 2012

So should I start with 5w30 or 10w30?

Febreezeit50 · Jan 15, 2012

If its going to be run in cold weather 5w30 imo. if not 10w30.

The difference between the two is only the start up oil weight. After the engine is at running temperature both oils are the same.

rangerboy101 · Jan 15, 2012

It gets ran in cold weather but not that often. Coldest weather it's been driven in was like 40*

torch93 · Jan 15, 2012

i run castrol 10w-30 on my 342 10.5:1 compression stang, no complaints

90mustangGT · Jan 15, 2012

For conventional oil I would run either a 10w30 or 5w30. Synthetics open up a whole new spectrum. I'm running M1 0W40. Instant oil pressure and less noise on cold start up, plus quieter at high rpms.

NIKwoaC · Jan 16, 2012

Like said above, a 5w30 and a 10w30 are pretty much exactly the same at warm operating temperature. In theory though, it's always better to run the lower first number. So, a 5w30 would theoretically be better than a 10w30. The reason for that, is any oil is "too thick" on cold start-up, regardless if it's 10 degrees or 100 degrees outside, considering that design operating temperature for your oil is above 200 degrees. (Though the effect becomes more noticeable as it gets colder.)

The thing is though, these engines were originally designed to live on 10w30, so running 10w30 is 100% OK. Some of us just like to over-think things.

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