Duratec slow oil warm up

47 posts / 0 new
Last post
Doc007
Doc007's picture
Offline
Last seen: 1 week 4 days ago
Joined: 27/10/2015
Duratec slow oil warm up

I recently had a 266bhp 2l Duratec installed with a dry sump and oil cooler (advised by Cosworth). I also had an oil temp/mechanical pressure gauge fitted and am surprised about how slowly the oil temperature comes up. Even with the cooler taped up today it took 10 mile trip with probably 5 miles of dual carriageway and some sitting in traffic before it reached around 83c. The coolant was around 90-95c and came up much more quickly and was in line with the previous 420 set-up (minus oil cooler/dry sump).

This seems to be a common theme with the 620s but is it a Duratec issue too?

Is it a case of not driving it at all until up to a certain temperature? Or just not giving it the beans until a certain temperature? I suspect it was the same with the previous engine but I didn't have an oil temperature gauge. Maybe ignorance was bliss. Or maybe not...

Dan R
Dan R's picture
Offline
Last seen: 15 hours 33 min ago
Joined: 20/05/2021

I will second this with my Duratec.  I dont have exact measurements, but i have noticed that the oil temp is slow to rise, unlike the water temp which is far quicker.   Is this another case of TADTS ?

R500sv

'Bravery is being the only one who knows you are scared' 

mph
mph's picture
Offline
Last seen: 4 hours 51 min ago
Joined: 08/06/2021

Isn't this the case with all cars? My previous 911 used to behave the same — water temp up in 5 minutes or less, oil would be a fair bit longer, 10-15 minutes.

I don't have an oil temp guage on my R400 (next upgrade!), but I'm sure it's the same — the oil pressure seems higher when first driving the car, indicative of cold oil perhaps?

Doc007
Doc007's picture
Offline
Last seen: 1 week 4 days ago
Joined: 27/10/2015

Quite possibly a TATDS but could have ramifications with regards to engine longevity.

 

mph
mph's picture
Offline
Last seen: 4 hours 51 min ago
Joined: 08/06/2021

Yup. Personally I've always been mechanically sympathetic to my performance cars anyway, giving them plenty of time to warm up [oil] even when I've not had a gauge to tell me what's happening.

I started a thread here a little while ago about oil types and usage, and there was plenty of helpful advice. The previous owner of my car had run it on 40, not 50, oil and I'm beginning to realise why — very little 'hard use' and therefore little opportunity to get it fully up to temperature. For general road use I'm getting the idea that the oil radiator is overkill too. You tape over yours for general road use?

Edit: Just found this interesting thread about oil too.

David_Long
David_Long's picture
Offline
Last seen: 41 min 41 sec ago
Joined: 17/04/2014

Duratec's can run cool on the oil side of things. The dry sump tank and plumbing does dissipate quite a lot of heat and if it's a finned Cosworth sump you have then this is even more pronounced. Personally I think the Ford Modine heat exchanger is better than a radiator type oil cooler. As long as you see 60C I wouldn't worry too much as the internal oil temp will be exceeding water temp and probably over 100C  in places (ie pistons, big ends, etc). 

O.G.
O.G.'s picture
Offline
Last seen: 1 hour 8 min ago
Joined: 28/05/2016

Whilst passengering with my son driving our 360R (wet sump DURATEC) I noticed after 3 to 4 miles the coolant had reached normal. But at 4000 rpm the oil pressure was just a smidgin off the red. To an engineer like me that is not ideal even making allowances for Caterham instrumentation.

After ten miles and again at 4000 this had dropped to closer to 6 bar than the red. 

I have resigned myself to do the ten miles warm up before "pushing on" and remain with Miller 5/50 till the oil change is due and then reassess. I do do a few track days a year.

I recently had a Beemer with an oil temp gauge that also showed you needed 10 miles to get up to normal so maybe it's the same for all vehicles.

O.G.
 

 

SM25T
SM25T's picture
Online
Last seen: 7 min 53 sec ago
Joined: 17/04/2014

Same on all engines. The oil takes a lot longer to warm up. On my k-series the oil reaches 50C only after about 10-15miles. I keep the revs below 4000 until the oil gets up to 50-60C

aerobod
aerobod's picture
Offline
Last seen: 4 hours 15 min ago
Joined: 17/04/2014

The only car I have had that doesn't have the oil temp significantly lag the water temp for at least 10km is the BMW M240i with the B58 engine. The sophisticated heat management and engine encapsulation (with insulation) can keep heat in the engine for up to 36 hours after shutdown with that engine, getting the oil up to temp within about 5km (very close to the water coming up to temp), if the car is used daily.

James

7 wonders of th...
Offline
Last seen: 5 hours 11 min ago
Joined: 17/04/2014

Which oil cooler do you have ...? conventional radiator type or modine...? if the former do you have a stat fitted and what rating?

which DS and tank are you using ?

Where is your temp sender located?

 

For comparision I run 82 degree coolant stat, a 7.5Ltr Raceline DS with a tank in short footwell location and no cooler yet, oil sender in the sump trough to communicate peak temps.

Coolant up the temp in 2-3 miles, oil see 85-90 in 5-6 miles, I increase the 'beanage' applied as the oil temp rises, this is based on a 10W/ 60 oil

Personally I prefer a stat controlled conventional oil cooler as coolant and oil temps can be maintained at individual requirements, the modine will peg them at the same temp.

Mocal are a good oil stat available with 80 or 92 degree stat,

http://www.mattlewisracing.co.uk/product.php/1835/1190/mocal_remote_oil_cooler_thermostat

 

 

Golf Juliet Tango
Offline
Last seen: 5 min 3 sec ago
Joined: 17/04/2014
Oil does take a lot longer to warm up. This is wholly typical. Add some heat dissipation into the system and it will take longer.

Stephen

Democratic dissent is not disloyalty, it is a positive civic duty