What weight oil do you use??

rustang94 · Aug 16, 2006

I've been using mobil 1 10w30 but my motor (306) came with a high volume oil pump and when I rebuilt it I put a factory pump in. I was thinking of going up in weight of oil to compensate the difference. What do you think? At operating temp I'm about 25psi cold 50psi( normal ).

94-302-vert · Aug 16, 2006

Do a search, this was discussed recently...

I use 10W40 dino (cheap stuff) with almost 150k on the motor. No idea about my actual oil pressure as I am still using the stock idiot gage (light with a needle basically).

1TallMF · Aug 16, 2006

Stock motor, 105k miles
Mobile 1 10W30 with Ford filter

Who rebuilt your short-block? Did they recommend a specific weight? The weight of oil used should be more dependant on the tollerences existing in the new bottom end, and not necessarily which oil pump you have. I'd say stick with the 10W30. Running heavier oil weight is not all that beneficial for a street car IMO, unless of course its got alot of mileage.

rustang94 · Aug 16, 2006

1TallMF said:
Stock motor, 105k miles
Mobile 1 10W30 with Ford filter

Who rebuilt your short-block? Did they recommend a specific weight? The weight of oil used should be more dependant on the tollerences existing in the new bottom end, and not necessarily which oil pump you have. I'd say stick with the 10W30. Running heavier oil weight is not all that beneficial for a street car IMO, unless of course its got alot of mileage.

A guy I know had it built at http://www.f-p-s.com/ Than he rolled his car and I bought the motor rebuilt it and here I am. I'll give them a call..

wytstang · Aug 16, 2006

Keep the 10w30 and do an oil sample report only real way to know.

illwood · Aug 16, 2006

I run AMSOil 10W30 and I'm at about 59 psi on a cold start and 27 psi hot idle.

Almost at 80,000.

TheDamned · Aug 16, 2006

10w30 aswell

parchisi · Aug 16, 2006

15W-50 race

Grn92LX · Aug 16, 2006

Mobil 1 ext performance 15W50 with a mobil 1 ext performance filter. N/a pump gas 7000 rpm 347.

bill302 · Aug 16, 2006

castrol 10W30

5spd GT · Aug 17, 2006

I used 10w-30 with my rebuild 302. Regular Castrol GTX until I put some more miles on it, and then I'm going synthetic.

Grn92lx - You do not rev your car to 7,000rpm.

Grn92LX · Aug 17, 2006

5spd GT said:
Grn92lx - You do not rev your car to 7,000rpm.

5spd GT, yes I do. All the time? No. When I wanna get all on it, I sure do

95Vert · Aug 17, 2006

I also use the 15-5o mix with one bottle of Lucas.

fawcett · Aug 17, 2006

I've switched from some 50W Synthetic back down to 10-30W Synthetic. Now that Im not as broke as I was in college I made the switch from Penzoil to Mobil 1. I used the Fram Filter until I read about how much they sucked. Now its a Mobil 1 Extreme Filter as well. Those oil tycoons are sucking my racing funds dry with these high prices!

Can anyone let me know why my oil smells like gas?
It keeps happening....
-fawcett

wytstang · Aug 17, 2006

fawcett said:
Can anyone let me know why my oil smells like gas?
It keeps happening....
-fawcett

Blow-by possibly it is normal for gas to get mixed up with oil due to idling and city driving. My oil sample (2oz) contained 1.3% of fuel which did lower the viscoty a bit, but wasn't bad either.

MustangGT95 · Aug 17, 2006

I wouldn't run lucas. I haven't heard anything good about it. I run it in my Somona because I have 165k on it and it smokes lol. I have heard it foams up when inside the motor.

I have no facts to back it up but I have heard it sucks...

urban96 · Aug 17, 2006

mobile1 10w30 synth

wytstang · Aug 17, 2006

MustangGT95 said:
I wouldn't run lucas. I haven't heard anything good about it. I run it in my Somona because I have 165k on it and it smokes lol. I have heard it foams up when inside the motor.

I have no facts to back it up but I have heard it sucks...

Here is why I would never use Lucas (Facts)
http://bobistheoilguy.com/images/lucas/lucas.htm

5spd GT · Aug 18, 2006

Grn92LX said:
5spd GT, yes I do. All the time? No. When I wanna get all on it, I sure do

6,700 is not 7,000rpm.

The way you posted it, makes it appear like it routinely sees 7000rpm on back-2-back track trips.

On the oil foaming, that can be big problems...some year Toyota Avalons had a problem with "foaming" oil, so the next step was engine replacement Don't ask...hehe.

fawcett · Aug 18, 2006

I read the write up by Bobistheoilguy just after I changed my oil. It sucks that I put a quart of Lucas synthetic oil in instead of just 5 quarts of Mobil 1 synthetic. Im bummed out but there is no way that I am going to change the oil right away just because of the foaming -I will change the oil sooner than I want to though. That guy Bob seems like he is the man. I enjoy reading through his website-so informative.

So for you guys reading this post:
Dont use Fram Filters-They dont filter well, infact they are the worst on the market
Dont use Lucas Oil-It foams up with air bubbles and doesnt protect your engine like any other brand of oil would (and its wicked expensive!)

-fawcett

What weight oil do you use??

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