herbiemercman Posted October 11, 2015 Share Posted October 11, 2015 Hi Guys, I am learning to live with a post NA/T transplant and I just did a 200 mile high speed journey (90 to 110 ish), and my oil temp was averaging 135 deg. cent. for 2 hours or so. Now from past experience my oil following an oil change looks a golden colour, now i have new semi synth oil as the NA used to have and after the 200 miles it has turned black? So i assume the turbo and extra power etc has cooked the oil? So i would be interested to know from NA/T members what there experience has been ? I have just ordered 5 litres of "Titan" fully synthetic 10w - 50w competition oil, which contains esters etc and thrives on hot turbos. £56. inc.vat. delivered. "Opie Oils". My coolant, pre the NA/T conversion, was "4 life", waterless,by Toyota, and was fine for me for the past 20 years, a fantastic product, especially for tuned engines, quicker conductivity for fast warm up, anti-corrosion etc, etc, £34. inc.v. 10 litres.del.free. The "Vauxhall pink water based stuff will be drained away. IMHO, if you spend a few grand on your engine, then the best liquids is a must. What do you think ? herbiemercman. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 11, 2015 Share Posted October 11, 2015 First of all I wouldn't post your crazy speeds on a public forum. Secondly 135 degrees is pretty hot for oil, no wonder it was black. have you got an engine oil cooler fitted? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 11, 2015 Share Posted October 11, 2015 The N/A is not built for cooling a turbo, so I would say an oil cooler is a must, although a good fully synth should cope, that sort of temp on a regular basis is going to call for very regular changes, so save yourself some cash and fit a decent oil cooler. Quote Link to comment Share on other sites More sharing options...
bignum Posted October 11, 2015 Share Posted October 11, 2015 If your oil is cooking at those speeds wait till you hit some proper speeds, as said you need a cooler, btw where and how are you measuring it? Quote Link to comment Share on other sites More sharing options...
Scott Posted October 11, 2015 Share Posted October 11, 2015 Yeah that's not right. You would need to be caning it big style to hit those oil temps. Your ideal temp is 100 deg. You're always going to be higher on a track, hence oil coolers, but just cruising on the motorway, 110 leptons is cruising to be honest, you shouldn't be even getting close to that. Quote Link to comment Share on other sites More sharing options...
bignum Posted October 11, 2015 Share Posted October 11, 2015 Yeah that's not right. You would need to be caning it big style to hit those oil temps. Your ideal temp is 100 deg. You're always going to be higher on a track, hence oil coolers, but just cruising on the motorway, 110 leptons is cruising to be honest, you shouldn't be even getting close to that. Mine used to get to 120c with a short blast when i first went single, added a 19 row cooler and its perfect now, 3 laps of the ring and its around 100c Quote Link to comment Share on other sites More sharing options...
Scott Posted October 11, 2015 Share Posted October 11, 2015 Mine used to get to 120c with a short blast when i first went single, added a 19 row cooler and its perfect now, 3 laps of the ring and its around 100c A short blast for you is absolutely caning it to others Quote Link to comment Share on other sites More sharing options...
bignum Posted October 11, 2015 Share Posted October 11, 2015 A short blast for you is absolutely caning it to others Well true mate:innocent: Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 Hi Guys, Many thanks for the comments, the oil temperature sensor is just above the oil filter boss and yesterday i was driving "fairly quickly", not caning it, just constant high speed and the oil temp was 120 deg.C and stayed at that, driving normally it settles at 90 deg.C. Some days back on a 200 mile high speed journey the oil was at 135 deg.C most of the time. I have ordered a high spec fully synth oil and then i will keep a watching brief, may fit an oil cooler later depending on the condition of the new oil? Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 (edited) Hi Guys, Some of you must have been down this road with oil temp issues. I have only just post NA/T had an oil temp gauge fitted, so i have never known what the pre NA/T temp would be, all i have to go on is a qualatative observation in that my oil used to stay a golden colour but now after only 300 miles, post NA/T the oil has gone black. Oil temp 100 deg.C with moderate drivng, and 135 deg.C fast cruising. So am i right in thinking that if you are taking nearly double the horse power from the same basic engine, then it will produce far more heat, so if this is a fundamental fact, then a high spec oil fully synth etc and possibly an oil cooler must be required? What else is there that can cause overheating of your oil ? My coolant running temperature is as it has always been? There are differing experiences and opinions on this subject, may be some honest but wrong beliefs, so any comments from your experience will be much appreciated. Edited October 12, 2015 by herbiemercman (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 12, 2015 Share Posted October 12, 2015 Did you not post another question on the same subject yesterday? Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 Hi Tricky, That posting yesterday was about how to combat high oil temp, new oil, oil cooler etc, this is a question about what can cause high oil temperature, hopefully it is normal when you go post NA/T, but would like some comments to see if there is some thing that needs attention? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 12, 2015 Share Posted October 12, 2015 Going by your other post on the same subject which I suspect will get deleted, you seem to think that the advice your being given is not correct for some reason? Anyway have a think about this.... Y You have fitted a turbo to an engine that was never designed to have one, turbos get very hot by design, turbos are either cooled by oil, or by oil and water, now I suspect that your turbo is oil cooled as its a pain to add water cooling on the N/A, this leaves the job of cooling to the oil only. If you drive at mostly off boost, the temp is not going to change much as the turbo is not super heating the oil, but put your foot down and use boost and the turbo gets VERY HOT, the N/A is fitted with an water/oil cooler but this is not sized or intended for a turbo so you can see where this all leads I'm sure, just fit an oil cooler like most other N/AT conversions and stop worrying. On the subject of your water temp, the water cooling system is by design far more efficient and is intended to cool the engine under all conditions, it is also controlled by a thermostat, which keeps a much more even temp simply because of the size of the rad, so can deal with fluctuations much quicker, apply the same theory to the oil and you will have no further problems. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 12, 2015 Share Posted October 12, 2015 I have replied to the other thread to keep things all in one place, I suspect a mod will delete this one. Quote Link to comment Share on other sites More sharing options...
craig85 Posted October 12, 2015 Share Posted October 12, 2015 Cause of high oil temp: Not enough cooling Combat high oil temp: More cooling As you've been told in at least one other thread, get an oil cooler Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 So all NA/T's need an oil cooler ? I have been told that many do not have them ? Why ? Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 Hi Tricky, Good technical answer which makes sense to me, before i shell out on an oil cooler, big bucks, do you think i could be ok with the titan high spec fully synth oil ? £55 for 5 lit. There are different opinions on this and i was given the thumbs up with a semi synth oil and no oil cooler required? Quote Link to comment Share on other sites More sharing options...
David P Posted October 12, 2015 Share Posted October 12, 2015 More power requires burning more fuel, burning more fuel generates more heat. It would be a good idea to fit an oil cooler. Quote Link to comment Share on other sites More sharing options...
craig85 Posted October 12, 2015 Share Posted October 12, 2015 Also consider that in an NA the very hot exhaust gases go straight out, however they now travel through your turbo and whilst in there heat up your oil. Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 Hi David, My post NA/T driving and the high oil temp supports what you are saying and Tricky has sent me a good technical reply saying the same. My previous advice was i would not need an oil cooler unless i was hammering the car and that too cold oil was also not good either, I have NOT hammered the car, just sustained fast cruising with the odd burst, so it comes down to peoples opinion on what hammering means, from the comments to date and the experience i have had with high oil temp and black burned oil, i accept an oil cooler is required, and they are not cheap, they should really become part of the NA/T kits, IMHO. Thankyou for your help. Quote Link to comment Share on other sites More sharing options...
craig85 Posted October 12, 2015 Share Posted October 12, 2015 The oil will still get hot, if you use different oil do you expect this heat to go elsewhere? A better quality oil may be able to survive high temperature better, but it can't simply make all that heat disappear. Quote Link to comment Share on other sites More sharing options...
David P Posted October 12, 2015 Share Posted October 12, 2015 No harm done, fit an oil cooler and all will be fine. Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted October 12, 2015 Author Share Posted October 12, 2015 I think i have to agree, it's just that some well respected members think it is ok to go NA/T without an oil cooler, but that has not been my experience and i have not been hammering the car, just fast cruising with an odd burst, oil 135 deg C and turned black in 300 miles or so. It must be peoples interpretation of what hammering means and now i feel from my experience that the oil cooler should be included in the NA/T kits. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 12, 2015 Share Posted October 12, 2015 Hi Tricky, Good technical answer which makes sense to me, before i shell out on an oil cooler, big bucks, do you think i could be ok with the titan high spec fully synth oil ? £55 for 5 lit. There are different opinions on this and i was given the thumbs up with a semi synth oil and no oil cooler required? That's odd I could swear I already posted an answer to this... oh well, your only ever going to get different opinions as to what oil to use, its up to you, all I will say is that I have only ever used semi synth oil in all my cars the last two being a 350BHP S14, and my single turbo Supra with 550BHP, and never had a problem, and the Supra was running a big oil cooled turbo........with an oil cooler;) Quote Link to comment Share on other sites More sharing options...
Gaz6002 Posted October 12, 2015 Share Posted October 12, 2015 Threads merged. Please only post the one. It just winds people up if you repost things all the time to get the answer you want to hear. FWIW, an oil cooler isn't expensive. It's cheap, easy and should help. Should have bought a TT engine though Quote Link to comment Share on other sites More sharing options...
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