32psi warm idle
Shaeffers 5w30
4k on a rebuild

 

20 psi warm, 18 warm in drive, 40 at cruise, 45 at wot. 50 miles on new motor. Stock replacement melling pump with whatever spring it came with.

 

That's a good question. I don't have a definite answer.

I don't know exactly which additives are used to reduce foaming. If you could single them out then you could look at the additive %s and make a more educated guess about it?

I do know that one of the best ways to avoid foaming is to control oil drainback and keep oil away from the crank. Deeper pans, windage trays, drainback modifications, etc., all help to combat that situation.

As for bikes, I've been a Torco user for years.

-Mindgame

 

900rpm idle
Penzoil 5w-30 oil
65 psi pressure at idle and driving.

Sometimes it drops to 50 upon driving.

 

yea about 20 psi at idle about 50 at crusing speed almost 80 at wot just turned 147000 miles and going strong! penzoil 10w 30 fresh oil change

 

Royal Purple 5W30
850 RPM Idle
50 PSI Cold
40-42 Warm

 

95 - 100k on odo - 2nd owner
Castrol GTX 5w30 (only for 3k miles)
10 - 18 psi full HOT @ 800 RPM idle
65 psi cold idle
30 psi full HOT @ 1500 RPM
40 psi full HOT @ 2000 RPM

01 - 65k on odo -2nd owner
Castrol Syntec 5w30 (next change)
30 - 35 psi (questionable accuracy) full HOT @ 800 RPM
55 - 60 psi cold idle
40+ psi ( questionable accuracy) full HOT above 1500 RPM

 

Castrol Syntec 5W40
Stock Idle RPM ~ 800 rpm
1/4 mark on the OEM pressure gauge

 

not only the tachs are off but so are the oil psi guages...a stock LT1 will only push 6-10psi at idle..20-30@ cruise and 40-50 at WOT...i know becasue i installed an aftermarket oil pressue guage...and had it rechecked by a local speed shop when i saw 8 psi at idle...then did some research when the speed shop confirmed...i read a book that all LT1'ers should read...its called "rebuilding and blueprinting LT1/4 engines" by mike maverign
http://www.rollingfelony.com/car-boo...557883939.html

it states in it that stock oil pressure for an LT1 engine is 6-10 psi

 

I have what Sigmund Freud would describe as oil pressure envy!!!
stock guage: 50 psi cold and 17-18 psi warm idle

 

yeah I seriously question all factory gauges. Haha my idle is set at 750 right now, and it still reads 900 or so, plus I did some WOT runs that said 6500 on the tach, only 6200 according to my computer ??? time for shift light

 

Here is my calibration when comparing the stock gauge to an aftermarket mechanical gauge.

1/4 mark = 20
1/2 mark = 50
3/4 mark = 80
4/4 mark = 100ish

My friends with the same setup have confirmed the same thing +/- a couple lbs.

 

10-40W Royal Purple Synthetic
153k miles
stock idle for and M6 around 800 rpm's
right at first mark hot idle
and just below middle line at hot cruise
never seen it go above the middle line

 

Ditto for me. I thought you were describing my car at first.

 

I just replaced my stock gauge with a mechanical one and then changed to some Castrol Syntec 5W-30 and 1/2 a pint of Lucas Oil Treatment.

My 5.0L LB9 engine is basically stock (except a 160 degree therm, K&N and straight pipe exhaust).

Idle pressure 22-25 when at normal temperature
27-40 when idle at HOT temperature (like 195)
35-39 when hitting the gas when 160 degrees (most of the time).

I guess those pressures are REAL good, eh?