Oil type and temp Questions (houston area)

dawudih · 09-20-2011, 09:24 PM

Quote:

Originally Posted by Lug

College Station huh? You sure your car is not on fire?

Seriously, run your car for a few thousand mile before doing anything. I've seen several people say that after breakin, cars run a bit cooler and use less oil.

dawudih · 09-20-2011, 10:01 PM

Quote:

Originally Posted by wstar

Re: the Mocal questions, I called them a couple of years ago when I bought my thermo plate, I've posted this like 3 times on different threads here somewhere:

The Mocal starts with both passages (oil cooler + bypass) open. The thermostat closes the bypass passage gradually over roughly the 175-185F range. So at 185+, basically all of your oil flow is forced through the cooler. Under 175, most of it takes the bypass route (least resistance), but a small amount will still flow through the cooler as well since the passageway is open (and this helps warm up the cooler and lines themselves, so it's not a sudden temp shock).

This means that the oil cooler passage does not have the capability to close?

wstar · 09-20-2011, 10:07 PM

Correct, the Mocal thermo plate has a permanently open passage to the cooler, there's no valve on it. There's also a bypass passage that skips the cooler, and when both are open it's the path of least resistance and gets "most" of the flow. When the thermo gets hot, the valve closes off the bypass path.

roy'sz · 09-23-2011, 01:28 PM

I wouldn't necessarily call it the bypass. Part of the oil goes through the filter and back to your engine. Not all of the flow is designed to go throug the cooler. After it flows to the cooler it comes back through the filter and to the Engine. Other than that yeah that's pretty accurate.

AggieDriver · 09-23-2011, 09:47 PM

Quote:

Originally Posted by dawudih

Again, please read. Car was purchased with 25k miles. It's broken in.

wstar · 09-24-2011, 01:22 PM

Quote:

Originally Posted by roy'sz

I wouldn't necessarily call it the bypass. Part of the oil goes through the filter and back to your engine. Not all of the flow is designed to go throug the cooler. After it flows to the cooler it comes back through the filter and to the Engine. Other than that yeah that's pretty accurate.

It's a bypass for the path through the cooler. When fully hot, all flow goes through the cooler (well, within mechanical limits, obviously there's no perfect seal on the valve).

Regardless of the bypass valve's position (regardless of temperature), all fluid goes through the filter (although the filter itself will also have a bypass that makes it practically useless at high flow rates).

Dark Sarcasm · 09-25-2011, 10:37 AM

Check Baker Nissan. They are off of 290 in the Houston area and probably about an hour and fifteen minutes from College Station.

09-20-2011, 10:07 PM	#63 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Correct, the Mocal thermo plate has a permanently open passage to the cooler, there's no valve on it. There's also a bypass passage that skips the cooler, and when both are open it's the path of least resistance and gets "most" of the flow. When the thermo gets hot, the valve closes off the bypass path. __________________ 7AT Track Car! Journal thread / Car setup details

09-25-2011, 10:37 AM	#67 (permalink)
Dark Sarcasm Track Member Join Date: Dec 2010 Location: Katy Texas Posts: 552 Drives: 11 CTS-V Coupe Rep Power: 15	Check Baker Nissan. They are off of 290 in the Houston area and probably about an hour and fifteen minutes from College Station. __________________ wax

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09-23-2011, 01:28 PM	#64 (permalink)
roy'sz A True Z Fanatic Join Date: Aug 2011 Location: palmdale, ca Posts: 1,299 Drives: 2010 nissan 370z Rep Power: 16	I wouldn't necessarily call it the bypass. Part of the oil goes through the filter and back to your engine. Not all of the flow is designed to go throug the cooler. After it flows to the cooler it comes back through the filter and to the Engine. Other than that yeah that's pretty accurate.