JohnA Posted May 6, 2006 Author Share Posted May 6, 2006 Thats a bit excessive is'nt it John....is that needed, It depends on the pattern of usage. If you only do 1000miles in 6 months and those miles are mostly full boost blasts, then the oil has got to go. If you do daily mild motorway miles then after 5K miles the oil will still be useable. (these are two extremes) Link to comment Share on other sites More sharing options...
JohnA Posted May 6, 2006 Author Share Posted May 6, 2006 ... so I guess it doesn't blow the oil seals out straight away.... It's not excess oil that blows the seals, rather excess *pressure* My first suspect would be crankcase pressure though, hence my obsession with keeping the stock crank ventilation setup. Link to comment Share on other sites More sharing options...
chilli Posted May 6, 2006 Share Posted May 6, 2006 ahhh ok, thought excess oil might tend to excess pressure, silly me. I looked at the oil left, I had 2*10l cans and now there is 4.25l left so no more than 5.75l can have gone in there (for full oil + filter change). I checked the oil level after parking it on more level ground yesterday and it's only reading a little over max now, so I think it might be ok. very strange that the level moves like that. My suspicion is what you mentioned, that maybe the sump changes shape causing readings slightly above max to look way over max, i.e. the scale goes totally non-linear. anyway I'll keep a close eye on it and if another reading shows it way above max again I'll be sure to drain some out, just not worth the risk otherwise is it cheers for the help Link to comment Share on other sites More sharing options...
Kranz Posted May 6, 2006 Share Posted May 6, 2006 JohnA Have you thought about spectroscopic oil analysis instead of throwing your fully synth lube out every 1500 miles? Its half the price of an oil change or less, it shows you exactly how the engine is wearing, how the oil is doing, its suitability for the job, when it needs changing & even how effective the air filter is! Also it can be a good record of service & maintenance. What better way to prove the integrity of the engine to a prospective buyer than tens of thousands of miles of data showing how the engine is wearing. I've done it on my 93 spec TT for the last 2 services & all's well in the engine. If something starts to go off, say a stuck or broken piston ring I'll see it in the wear metals & contaminants. Useful & cost effective! I once wrote an article about oil analysis on LPG powered cars that shows how in depth it can be: http://www.lubetrak.com/newsletter/May14HTML.html If anyone's interested mail me direct. Steve Link to comment Share on other sites More sharing options...
JamieP Posted May 6, 2006 Share Posted May 6, 2006 i had the same problem with my evo 7, over filled it twice when doing oil changes, was planning on doing the supra tomorrow ill be carefull now, thanks john Link to comment Share on other sites More sharing options...
JohnA Posted May 7, 2006 Author Share Posted May 7, 2006 ...Have you thought about spectroscopic oil analysis instead of throwing your fully synth lube out every 1500 miles? maybe on a freshly-rebuilt engine. Mine is over 100K, stem seals leak, turbos leak, not many surprises in store;) even how effective the air filter is! The stock filter changed regularly is as effective as it gets mate:D Also it can be a good record of service & maintenance. What better way to prove the integrity of the engine to a prospective buyer than tens of thousands of miles of data showing how the engine is wearing. What prospective buyer, I paid almost trade price on it and don't really expect surprises on depreciation either. It's hit rock-bottom by now. The oil I buy cheap in bulk anyway, so it's better to dump it before it's totally knackered. I've done it on my 93 spec TT for the last 2 services & all's well in the engine. If something starts to go off, say a stuck or broken piston ring I'll see it in the wear metals & contaminants. Useful & cost effective! It's good in catching engine wear trends, just like leakdown tests. Hell, even compression tests every time the sparks plugs are out can give an idea of engine wear. Free, too. I once wrote an article about oil analysis on LPG powered cars that shows how in depth it can be: http://www.lubetrak.com/newsletter/May14HTML.html That's quite interesting actually. How about you wrap it up in a document and submit it for the Tech FAQs of this forum? I'd be interested, and so would be several others here... Link to comment Share on other sites More sharing options...
Keith C Posted May 7, 2006 Share Posted May 7, 2006 Modern synthetic can last for 9,000miles in a stock Supra...cause lets face it that's the service interval for a stocker. Well, sort of - there's also an oil/filter only change every 4,500. Link to comment Share on other sites More sharing options...
Digsy Posted May 7, 2006 Share Posted May 7, 2006 Well, sort of - there's also an oil/filter only change every 4,500. Actually there isn't but so many people on here do it that its become part of Supra lore. The service book specifies that the 4500 mile interim oil change applies to 4WD vehicles only. Link to comment Share on other sites More sharing options...
Keith C Posted May 7, 2006 Share Posted May 7, 2006 No, no, there definitely is. The 4,500 intermediate oil service applies to turbo petrol vehicles. I can scan the pages in if you want Link to comment Share on other sites More sharing options...
Digsy Posted May 7, 2006 Share Posted May 7, 2006 Ummmm, yeah. That would be interesting. The info in this thread is what I have gone by in the past, but if there is an official Supra service book that shows the 4500 service then it should indeed be scanned in and posted here. Link to comment Share on other sites More sharing options...
Keith C Posted May 8, 2006 Share Posted May 8, 2006 Never saw that thread before! Anyway, attached are the relevant pages from my service book - this is a June '95 vehicle. Link to comment Share on other sites More sharing options...
Bob Posted May 8, 2006 Share Posted May 8, 2006 Slightly OT, but my Mum's friend was told the other day that she needed to top up the oil in her Punto, so she did. Right up to the top of the rocker cover. Needless to say, it was a little smoky. The AA man was amused though Link to comment Share on other sites More sharing options...
Digsy Posted May 8, 2006 Share Posted May 8, 2006 Never saw that thread before! Anyway, attached are the relevant pages from my service book - this is a June '95 vehicle. Well, bugger me backwards. I stand corrected. Even more confusingly It looks like there is at least three different versions of the service book in circulation (plus, of course, the pre-1994 one(s) with the 6000 mile interval)! Out of interest, what does it say on the front of yours? Mine just says "Petrol vehicles" or some such. Link to comment Share on other sites More sharing options...
Keith C Posted May 8, 2006 Share Posted May 8, 2006 It just says 'PETROL' up in the top right corner. Link to comment Share on other sites More sharing options...
Keith C Posted May 8, 2006 Share Posted May 8, 2006 Interestingly, I do believe that both mine and Peter's cars came from the same dealer too... Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now