osso Posted January 18, 2004 Share Posted January 18, 2004 Why is Valvoline 5/50 so highly rated on this Forum? I would've have thought that Valvoline a little thin for turbo engines.. I used to use 15W40 Redline Engine oil or 15W50 Mobil 1 motorsport on my MR2 GT Turbo, however Redline Engine oil is pretty expensive stuff.. I would be interested to hear your opinions, especially when toyota recommends around 10w30. Cheers Link to comment Share on other sites More sharing options...
peter richards Posted January 18, 2004 Share Posted January 18, 2004 hi osso ,ive just put it in mine . i think the lower the first number is ,relates to the thickness of the oil, so 5 is thin , so it gets around quicker . and 50 has something to do with the operating temp, which is high enough for the turbos. and the make is well known for quality. hope im right , if not wtf sounds good . Link to comment Share on other sites More sharing options...
dude Posted January 18, 2004 Share Posted January 18, 2004 Originally posted by peter richards hi osso ,ive just put it in mine . i think the lower the first number is ,relates to the thickness of the oil, so 5 is thin , so it gets around quicker . and 50 has something to do with the operating temp, which is high enough for the turbos. and the make is well known for quality. hope im right , if not wtf sounds good . Trouble is if its too thin then Supras suffer with oil leaks hence 0 Weight is a no no ie Mobil 1 , front oil seal is prime candidate for a leak when using a thinner than reccomended oil !!!! Dude:flame Dev Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 Originally posted by dude Trouble is if its too thin then Supras suffer with oil leaks hence 0 Weight is a no no ie Mobil 1 , front oil seal is prime candidate for a leak when using a thinner than reccomended oil !!!! Dude:flame Dev I agree, which is the reason why im wondering why some people on here rate Valvoline 5/50 maybe there's something im not aware of. Link to comment Share on other sites More sharing options...
peter richards Posted January 18, 2004 Share Posted January 18, 2004 dude m8 , is this stuff ok then Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 i am pretty sure toyota recommends 10W30 on their engines, please correct me if im wrong Link to comment Share on other sites More sharing options...
peter richards Posted January 18, 2004 Share Posted January 18, 2004 i used it after reading threads on here , so i hope its ok , gaz was selling it , i cant see them recommending something that no good for our engines. do they sell engines btw lol. Link to comment Share on other sites More sharing options...
dude Posted January 18, 2004 Share Posted January 18, 2004 I know leon sells this so the answer would be yes its fine , but if you get any leaks then maybe this is the place to look , ive replaced a couple of front seals now and i know this is a weak point on the JZA-80 engine , personally i dont use valvolene , i think any decent oil of the correct viscosity will be fine , I use Mobil 1 Motorsport and do a change every 2500 miles with a Lexus oil filter . Dude:flame Dev Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 blimey every 2500 miles? Your engine oil must look very clean each to their own i guess, Ii used to change my oil and filter in the MR2 GT Turbo every 3,000 to 4,000 miles depends on how hard the car has been driven between oil changes.. Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 Are engine seals are serviceable items? I know alot of people on the supraforums site seem to recommend changing them during a service approx every 40,000 to 60,000 miles? maybe im talking bollox here Link to comment Share on other sites More sharing options...
Gordon F Posted January 18, 2004 Share Posted January 18, 2004 Originally posted by osso Why is Valvoline 5/50 so highly rated on this Forum? I would've have thought that Valvoline a little thin for turbo engines.. I used to use 15W40 Redline Engine oil or 15W50 Mobil 1 motorsport on my MR2 GT Turbo, however Redline Engine oil is pretty expensive stuff.. I would be interested to hear your opinions, especially when toyota recommends around 10w30. Cheers I believe it works like this. The first number (5) is the relative viscosity of the oil when it is cold, 0 being thinnest. 50 is the relative viscosity when it is hot. So Valvoline compared to 10W30, is thinner when cold, for easier starting, but thicker when hot, for better protection against wear. The W means that it is suitable for Winter use. Link to comment Share on other sites More sharing options...
peter richards Posted January 18, 2004 Share Posted January 18, 2004 gordon thats what i meant .lol . Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 Originally posted by Gordon F I believe it works like this. The first number (5) is the relative viscosity of the oil when it is cold, 0 being thinnest. 50 is the relative viscosity when it is hot. So Valvoline compared to 10W30, is thinner when cold, for easier starting, but thicker when hot, for better protection against wear. The W means that it is suitable for Winter use. Thats correct, but i dont think 5/50 is suitable for our climates, i pretty sure our weather isnt cold enough to warrent 5/50 all year round. Link to comment Share on other sites More sharing options...
LeeT Posted January 18, 2004 Share Posted January 18, 2004 so can anyone recommend another oil which is readily available(not mail order) for reasonable money? Link to comment Share on other sites More sharing options...
osso Posted January 18, 2004 Author Share Posted January 18, 2004 You can get Mobile 1 15W50 Motorsport from any halfords store.. I used to get redline 15W50 over the phone with next day delivery but not cheap.. Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 18, 2004 Share Posted January 18, 2004 You should be able to run an exotic 0 weight oil, like neo, without oil leaks. The seals shouldn't (an if in good order don't) care about oil viscosity, it's an urban myth. The main reason front seals give trouble is people try and run too much boost, damage rings or pistons (bores even..), get blowby into the sump, and the front seal seems the first place excess crankcase pressure vents oil from, or even blows the whole seal out. The breathers on the MKIV TT engine are quite small, they won't deal with worn bores and a lot of piston blow-by. Link to comment Share on other sites More sharing options...
dude Posted January 18, 2004 Share Posted January 18, 2004 My front seal went the first time it hit high boost after being stood for quite a long time , after being changed it hits higher boost ALL the time and never given a problem , how would you explain this ???? As James says the yanks also reckon this is a 'servicable' item hence a lot of threads about it , when changed for a new one the problem is cured , if it was a result of too high a boost setting it would simply re-appear !!! Dude:flame Dev Link to comment Share on other sites More sharing options...
Digsy Posted January 18, 2004 Share Posted January 18, 2004 Shaft seals have a metal chassis inside the rubber. I suppose its possible that this may have relaxed over time, or the rubber between the chassis and the housing has relaxed. I'd recommend having the front oil seal changed at the same time as the timing belt, since the front end drive is already stripped down. Link to comment Share on other sites More sharing options...
dude Posted January 18, 2004 Share Posted January 18, 2004 Originally posted by Darren Blake Shaft seals have a metal chassis inside the rubber. I suppose its possible that this may have relaxed over time, or the rubber between the chassis and the housing has relaxed. I'd recommend having the front oil seal changed at the same time as the timing belt, since the front end drive is already stripped down. My thoughts excactly . Dude:flame Dev Link to comment Share on other sites More sharing options...
Digsy Posted January 18, 2004 Share Posted January 18, 2004 Incidentally, when you replace a shaft seal its a good idea not to push it into exactly the same location as the previous one. Bizarre as it may seem, the floppy rubber sleaing lip actually wears a groove in the cranksfaft. Its nice to give the new seal a new surface to run on. Not very many engine designs allow for this, however. Link to comment Share on other sites More sharing options...
Ian C Posted January 18, 2004 Share Posted January 18, 2004 Originally posted by Darren Blake the floppy rubber sleaing lip actually wears a groove in the cranksfaft. Put yer teeth in, Blake -Ian Link to comment Share on other sites More sharing options...
Digsy Posted January 18, 2004 Share Posted January 18, 2004 Was that an attempt at base humour, Mr. C? Of course I would never understand it if it was of a sexual nature. No, really. It does. Couldn't believe it first time I saw it. *EDIT* ROFLMAO. Got it now. Link to comment Share on other sites More sharing options...
Chris Wilson Posted January 18, 2004 Share Posted January 18, 2004 Some fixes for crank wear grooves are HERE I use the stainless sleeves, or a seal with different lip positionng, if available. Link to comment Share on other sites More sharing options...
Justin Posted January 19, 2004 Share Posted January 19, 2004 Originally posted by dude My thoughts excactly . Dude:flame Dev Dude, loving your sig mate PMSL Link to comment Share on other sites More sharing options...
BigRoy Posted January 19, 2004 Share Posted January 19, 2004 Originally posted by Justin Dude, loving your shirt mate PMSL Oh dear! Link to comment Share on other sites More sharing options...
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