hodge Posted October 20, 2011 Share Posted October 20, 2011 Hi guys Im going to change the oil in the car. I've still go almost 2 tubs of Valvoline VRS 5w/50 which I was going to chuck in just to use it up. Now I've been reading about oils for single turbo Supras and it's recommended to use 15w50 or 20w50. If the viscosity of the 5w50 is too thin, what would be the symptoms or would you recommend I just don't use it. Thanks John Quote Link to comment Share on other sites More sharing options...
imi Posted October 20, 2011 Share Posted October 20, 2011 I use 5-40 without any issues. apparently better fuel consumption and quick to start up. imi Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted October 20, 2011 Share Posted October 20, 2011 The lower number is just relevant to cold starting. Don't think it will do any harm if you use the 5-50 instead of 15-50. Quote Link to comment Share on other sites More sharing options...
hodge Posted October 20, 2011 Author Share Posted October 20, 2011 Coolio, thanks guys. I did read a thread about using Mobil 1 and it leaking past the rings, I was just concerned this would be the issue. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted October 20, 2011 Share Posted October 20, 2011 Mobil 1 exposed turbo oil seals on a Soarer I once owned. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 Is it not the "50" part that's the issue with a single turbo? I don't really think it's the single itself that's the issue, more that due to being a single tubby it might be getting used harder and the oil temps might be right up there thinning the oil and potentially getting past the rings? Might be making that up though lol. Quote Link to comment Share on other sites More sharing options...
imi Posted October 20, 2011 Share Posted October 20, 2011 the 50 part suggests that it is a higher viscosity when at temp than for example a 40 grade oil (which will be thinner). what people suggest on here is to use 50/60 grade oil when tracking the car as the oil temps and stress can be higher for longer periods of time. imi Quote Link to comment Share on other sites More sharing options...
Ian W Posted October 20, 2011 Share Posted October 20, 2011 I certainly wouldn't be putting a 15w50 or a 20w50 in at this time of year (if the 0w Mobil1 is bad then these are the opposite end of the scale). A 5w or 10w would be just fine I'd imagine. Quote Link to comment Share on other sites More sharing options...
Scott Posted October 20, 2011 Share Posted October 20, 2011 the 50 part suggests that it is a higher viscosity when at temp than for example a 40 grade oil (which will be thinner). what people suggest on here is to use 50/60 grade oil when tracking the car as the oil temps and stress can be higher for longer periods of time. imi At least I was in the right ballpark Quote Link to comment Share on other sites More sharing options...
hodge Posted October 20, 2011 Author Share Posted October 20, 2011 Im a little lost here, are we saying something like 15w40 would be better. My oil does get very hot as I drive the car hard at every opportunity lol. Quote Link to comment Share on other sites More sharing options...
imi Posted October 20, 2011 Share Posted October 20, 2011 At least I was in the right ballpark not sure whether a single turbo'd supra needs the thicker oil. mine for example runs lower EGTs now that it is single as compared to when it was Twin - this is a comparison for normal street driving. I don't drive like a loony and don't track the car. Quote Link to comment Share on other sites More sharing options...
hodge Posted October 20, 2011 Author Share Posted October 20, 2011 not sure whether a single turbo'd supra needs the thicker oil. mine for example runs lower EGTs now that it is single as compared to when it was Twin - this is a comparison for normal street driving. I don't drive like a loony and don't track the car. My EGTs don't exide 800 degrees but my oil temp is always around 120 degrees. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 20, 2011 Share Posted October 20, 2011 What i tend to think about when changing grades of oil is the original specified grade, which with the Supra from what i remember is 10W30, As people have pointed out the first figure is just cold viscosity, and generally has little impact, other than cold start, and as we don't have winter temps of much less than -10c i really wouldn't worry much. Most people change to a 40w, and some recommend going to 50w, what happens when you start to use a higher viscosity oil is that it will still be 50w at 120c which is not always desirable at high RPMs as it requires more force to overcome the drag created, and the result is often higher oil pressure and a slight sapping of power, now i can see going to 40w as being OK but i personally would hesitate at using 50w. Quote Link to comment Share on other sites More sharing options...
hodge Posted October 20, 2011 Author Share Posted October 20, 2011 Thanks Ricky. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 20, 2011 Share Posted October 20, 2011 50 or even 60W oil will be fine, it may eat a few BHP but that's all. Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted October 20, 2011 Share Posted October 20, 2011 Mr Lee P and Ryan G recommended me millers 10w-60 fully synthetic race oil, however it is dear! So im a cheapskate and use valvoline 10w-60 vr1 race oil, has been perfect so far, and I can buy it for £30 for 6ltr from euro car parts Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 21, 2011 Share Posted October 21, 2011 I use Valvoline a lot, over 30 years plus it's been a good oil in everything from BMC A series to Cosworth DFV F1 engines. Quote Link to comment Share on other sites More sharing options...
sams Posted October 23, 2011 Share Posted October 23, 2011 i used the valvoline service before last.. i used mobil 0w60 this time all seemed fine tho Quote Link to comment Share on other sites More sharing options...
Fabolous Posted October 23, 2011 Share Posted October 23, 2011 I use the castrol rs 10w60. Works fine and you Can get it for 50 eur 5 liters. Quote Link to comment Share on other sites More sharing options...
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