Porsche 997 2006 (Engine oil temperature )

[vikdasor]

Hi All,

I'm new to the Porsche world and I wanted some of your knowledge on a issue (If a issue) i am facing with my "Engine oil temperature"

In simple words, it was normally idling at 90 and now its dropped to about 80 or a little lower sometimes. (See attached picture after driving for 1hr on the motorway)

Is there any suggestions/idea why this is happening, or it might be?

Thanks for your support in advance.

Kind Regards

 

[garymarsh]

I am assuming from what you have described, that the higher temp (90) is at idle & the lower temp (approx 80) is either on the motorway after an hour of driving or immediately at the end of such a journey?

If you car is stationery there will be very little natural air flow through the oil cooler (& water radiator). When you are on the motorway you are likely to be cruising in a tall gear (5th or 6th gear?) such that you will have a relatively high road speed for a lower engine RPM.

At higher speeds airflow through your oil cooler (& water radiator) will be optimised. This coupled to relatively low engine RPM (the engine is working less hard), all adds up to a drop in temperature. In simple terms, on the motorway, you are very likely to have reduced heat generation from the engine & increased cooling efficiency due to more airflow.

It is recommended that you regularly check & maintain the correct oil level. Keeping an eye on your Instruments (especially oil Temp, oil pressure & water Temp) is good practice, but I would be surprised if the variations you have observed are found to be outside of predictable parameters.

 

[garymarsh]

PS the photo you have supplied indicates closer to 85 than the 80 you stated !!! This being the case there is only a 5 degree variance in Temp.

 

[vikdasor]

Hi Gray,

First of all, thank you for your knowledge on this subject its much appreciated.

Just want to give you more more information:

1. I normally drive the car on weekends and the Porsche is covered on week days.
2. Normally when I start the car, I leave it running for about 5 minutes till the engine is settled.

what I gather from your comment is that its ok with cautions to keep eye on oil Temp, oil pressure & water Temp.

thank you again for your support and advice.

 

[jmaddox]

I wouldn’t warm mine for 5 minutes before driving each time. Increases chance of bore wear imho. Best to drive carefully straight away so it reaches operating temperature as soon as possible.

 

[vikdasor]

strange you should say that Jmaddox,

Normally they always say let the engine warm up, infect a lot of people say that because of the sporting engine of the car.

 

[Rodney Naghar]

The manual says otherwise - drive it straight away. Do let the engine get up to temp before going above 4K revs though.

 

[jmaddox]

Exactly as previous poster said.

 

[tscaptain]

I've always considered letting an engine idle, for any length of time from cold, was a bad idea.

 

[jmaddox]

I've always considered letting an engine idle, for any length of time from cold, was a bad idea.

Agreed.

 

[Motorhead]

I think you’ll find that the main reason manufacturers recommend driving straight off is to get the cat converter(s) up to temperature ASAP to reduce emissions rather than to minimise bore wear, which is less of a consideration with modern oils and tighter production tolerances on the water-cooled cars. In any case, the most critical time for potential bore wear will be on start-up until full oil pressure and circulation has been established.

Having said that, I always aim to drive off as soon as the idle speed has stabilised after a minute or two. Agreed that it’s important not to use full performance until coolant and oil temperatures have stabilised fully.

Jeff

 

[BC997S]

Having said that, I always aim to drive off as soon as the idle speed has stabilised after a minute or two. Agreed that it’s important not to use full performance until coolant and oil temperatures have stabilised fully.

Jeff

I do the same, as soon as it drops to 900, off I go but keep the revs down until the fluids are up to temp. Hope I'm doing it right!

 

[J99NNO]

I agree with the previous couple of posts, I usually bring the car out of the garage and when the revs drop slightly start my drive. The engine working to drive the vehicle will warm the fluids far quicker than simply letting it sit and idle, but keep the rpm low until operating temperatures are reached. I also usually walk back into the garage to check the floor for any signs of a leak, and by the time I have walked back out and shut the door, it is not long before the revs drop.