TONYL Posted March 1, 2011 Report Share Posted March 1, 2011 Hi all, I know this must have been covered before but i cannot find a clear answer. What oil should be used in the TR6 engine (66k miles) I am confused with all this synthetic and semi synthetic offerings from my local motor factors - must be getting old! Thanks Tony Quote Link to post Share on other sites
88V8 Posted March 1, 2011 Report Share Posted March 1, 2011 20/50 Classic oil, as only these contain ZDDP. Comma Classic is OK Also Halfords Classic Alec is attached to Silkolube 20/50 Or there are the more expensive offerings from Penrite or Millers. and see here http://www.tr-regist...showtopic=27446 It's a TR3 thread, but for the TR6 the answer is the same. Ivor PS you can't search on 'oil' in the forum, I found this recent thread by entering ... which engine oil TR register forum... in Google Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Texaco URSA TDX 10W40 or Texaco URSA SuperTD 15W40. Yes, these are diesel oils. Because diesels have no cats the ZDDP level has not been lowered as much as petrol oils where it has almost gone completely. TR engines need ZDDP. Advice came from USA builder of TR race-engines. I shall change oil every 2000m to minimise effects of interaction of ethanol with ZDDP. Quote Link to post Share on other sites
johnny250 Posted March 1, 2011 Report Share Posted March 1, 2011 I use this stuff no idea what's in it, it's oily though....... http://www.rimmerbros.co.uk/Item--i-RX1363?utm_source=froogle&utm_medium=feed Quote Link to post Share on other sites
Guest ntc Posted March 1, 2011 Report Share Posted March 1, 2011 Hi all, I know this must have been covered before but i cannot find a clear answer. What oil should be used in the TR6 engine (66k miles) I am confused with all this synthetic and semi synthetic offerings from my local motor factors - must be getting old! Thanks Tony Tony at 66k stick to 20/50 Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Castrol classic oils do themselves no good by not giving the spec on their site. But according to http://www.v8register.net/subpages/news040310ZDDPconcerns.htm -- your Castrol has ZDDP 0.08% apparently. The Castrol level 0.08% is low end of range given the list here: http://www.hotrod.com/techarticles/engine/flat_tappet_cam_tech/photo_10.html Of course there are detractors to the use of diesel oil: http://www.zddplus.com/TechBrief6%20-%20Diesel%20Oil%20Use%20in%20Classic%20and%20High-Performance%20Gasoline%20Engines.pdf - but they are selling a ZDDP additive. Quote Link to post Share on other sites
bluebob Posted March 1, 2011 Report Share Posted March 1, 2011 Hi Tony my car has just covered 105,000mls i change and flush the oil every year and use valvoline 20/50 racing spec my oil pressure is great and have had no problems at all i know its a bit pricey but so is an engine build? hope this helps bluebob Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Blubob, Oil pressure is not the problem with low ZDDP, its wear on the flat tappets - and cam lobes wiping themselves away. The ZDDP coats these surfaces. Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Hi Tony my car has just covered 105,000mls i change and flush the oil every year and use valvoline 20/50 racing spec my oil pressure is great and have had no problems at all i know its a bit pricey but so is an engine build? hope this helps bluebob And it has 0.13% ZDDP ( %age is for zinc) http://www.valvoline.com/faqs/motor-oil/racing-oil/ Stay with it! Quote Link to post Share on other sites
Guest ntc Posted March 1, 2011 Report Share Posted March 1, 2011 And it has 0.13% ZDDP ( %age is for zinc) http://www.valvoline.com/faqs/motor-oil/racing-oil/ Stay with it! Peter With respect,there are many points of view on this? the main problem is with the rocker not proven AFAIK elsewhere.I know of 3 main respected engine builders that advise going to semi synthetic oil after 5000 miles following an engine rebuild.You could also have a read on what the oilman has to say about it Quote Link to post Share on other sites
johnny250 Posted March 1, 2011 Report Share Posted March 1, 2011 Interesting that most of these classic oils should be changed at 2000 to 3000 miles....better take a can on my holidays then. john Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Neil Tappet and cam-lobe wear are the problem (tappets aka cam followers), not the rockers. My instinct is to stick with oil technology that was available when TR engines were designed- and that was based on many years of experience with conventional oils,which for decades had included ZDDP. A ZDDP search reveals many,many classics with flat tappets with the same oil problem. And even on TRR forum there are reports of excessively rapid cam-lobe wear in rebuilt engines - that should not happen, and it might not be the hardening at fault... If the oil companies stated what they use to protect flat tappets and cams in older engines then I would happily reconsider- because ZDDP reacts with ethanol and I presume their modern formulations are ethanol-tolerant. Meanwhile I'll stick with ZDDP-oils - and more frequent oil and filter changes. Peter Quote Link to post Share on other sites
TONYL Posted March 1, 2011 Author Report Share Posted March 1, 2011 Hi all Thanks for the replies Looks to be Halfords Classic oil? What level of ZDDP should I be looking for? Tony Quote Link to post Share on other sites
Guest ntc Posted March 1, 2011 Report Share Posted March 1, 2011 Neil And even on TRR forum there are reports of excessively rapid cam-lobe wear in rebuilt engines - that should not happen, and it might not be the hardening at fault... And many more Peter alas most do not check the hardening after the event Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Tony, Not too much (which rules out sloshing in concentrated ZDDP additive), and not too little: http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1049812 ZDDP level is measured as phosphorus: looks from above you want no more than 0.13% and not less then 0.065%, and the ZDDP content depletes with use. If only we knew what Duckham's 20-50 contained in the late '70s and '80s- I ran 200,000m on that. Peter Quote Link to post Share on other sites
88V8 Posted March 1, 2011 Report Share Posted March 1, 2011 Of course there are detractors to the use of diesel oil: http://www.zddplus.c...e%20Engines.pdf - but they are selling a ZDDP additive. They also point out the problems with racing oil. Mind you, with the dodgy petrol we have to use now, tempted to tip an eggcup of Castrol R in the tank every time I fill up What level of ZDDP should I be looking for? Around 1% if you can find it. Does anyone over here sell ZDDP Plus? Ivor Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Ivor More ZDDP is not better. Try giggle with "excess ZDDP" More ethanol is!... ...but not in petrol. ... preferably as Merlot Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Tony Halfords are cagey about ZDDP content - did not answer direct question: http://answers.halfords.com/answers/4028/product/537977/questions.htm?page=2 I would avoid, and go with an oil where ZDDP (as either Zn or P) is stated. This is the sort of data-sheet you should get: http://www.hwpetro.com/_fileCabinet/TexacoData/URSA-Premium-TDX-15W40-pds.pdf Let us know what you find! Peter Quote Link to post Share on other sites
Guest ntc Posted March 1, 2011 Report Share Posted March 1, 2011 (edited) Neil Tappet and cam-lobe wear are the problem (tappets aka cam followers), not the rockers. My instinct is to stick with oil technology that was available when TR engines were designed- and that was based on many years of experience with conventional oils,which for decades had included ZDDP. A ZDDP search reveals many,many classics with flat tappets with the same oil problem. And even on TRR forum there are reports of excessively rapid cam-lobe wear in rebuilt engines - that should not happen, and it might not be the hardening at fault... If the oil companies stated what they use to protect flat tappets and cams in older engines then I would happily reconsider- because ZDDP reacts with ethanol and I presume their modern formulations are ethanol-tolerant. Meanwhile I'll stick with ZDDP-oils - and more frequent oil and filter changes. Peter Peter It is the rocker that fails from what I have seen.The cam issues go on, try incorrect oil spiral grooves also Edited March 1, 2011 by ntc Quote Link to post Share on other sites
RogerH Posted March 1, 2011 Report Share Posted March 1, 2011 I have been using Halfords classic 20/50 for about the last 5 years which equates to apprx 45,000 miles. Various speeds (up to 80+) and long motorway journeys at elevated speeds. Various terrains - flat, hilly, mountainous (Norfolk is a nightmare) and the RBRR 2010. The engine is standard in every way except that when the engine was built in mid 90's uprated valve springs were used (probably not needed though). Due to oil consumption/loss I top up apprx 0.5ltr/1000 miles. Since using Halfords oil I have not noticed anything going on in the cam department. I changed the rocker shaft last autumn as it had done 100,000+miles (the uprated valve springs may have not helped here). Not very scientific but it gives me a comfy feeling. Roger Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Ivor, CastrolR in the fuel tank?- did that decades ago. It did not mix, only entered the carbs after a sharp bend when some of the pool of oil in bottom of tank was sucked up. Following cars benefited from the puff of aroma. Apparently castor oil will dissolve in ethanol: http://www.uoguelph.ca/plant/courses/plnt-6250/pdf/I_Malchev.pdf (page 15) We have just found the sole advantage of E5, E10. Do hope FBHVC include it in their tests.... Peter Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 I have been using Halfords classic 20/50 for about the last 5 years which equates to apprx 45,000 miles. Various speeds (up to 80+) and long motorway journeys at elevated speeds. Various terrains - flat, hilly, mountainous (Norfolk is a nightmare) and the RBRR 2010. The engine is standard in every way except that when the engine was built in mid 90's uprated valve springs were used (probably not needed though). Due to oil consumption/loss I top up apprx 0.5ltr/1000 miles. Since using Halfords oil I have not noticed anything going on in the cam department. I changed the rocker shaft last autumn as it had done 100,000+miles (the uprated valve springs may have not helped here). Not very scientific but it gives me a comfy feeling. Roger Quote Link to post Share on other sites
Peter Cobbold Posted March 1, 2011 Report Share Posted March 1, 2011 Roger Not sure what happened there... No worries then, that's a good mileage test. Those pesky Norfolk hills - not long before they'll be the only bits left. Peter Quote Link to post Share on other sites
johnny250 Posted March 2, 2011 Report Share Posted March 2, 2011 Those pesky Norfolk hills - not long before they'll be the only bits left. Peter I can cope with the hills..... It's the 40/50mph speed limits in open country between the hills that I find difficult...... and the sooner they complete the dualling of the A11, the sooner we will be swamped by more grockles coming to have a look at Nelsons own..... john Quote Link to post Share on other sites
Peter Cobbold Posted March 2, 2011 Report Share Posted March 2, 2011 John Don't I know it - the coast road crawl- got family in Wells-n-t-S. A big plus here in N.Wales' are the empty roads, and hardly any grockles year round. Mind you 97RON not abundant either.... Peter Quote Link to post Share on other sites
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