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Engine oil

Postby Doive » 23 Jan 2005, 21:42

Was walking round Halfords today searching for 20W-50 other than the cheapo stuff I'm using at the moment. What grade/make does anyone else use or recommend? I know the oil I have is very very heavy and especially on cold mornings the tappets can be rattling for a good five minutes before the oil quietens them down. Been told this is perfectly normal and after a good run the whole lot is bathed in oil so I know its getting up there! I would just like to know what everyone else uses so I can change to something else next time if needs be.
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Postby Shellysowner » 23 Jan 2005, 23:07

20-50w Duckhams all the way. It's great stuff.
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Postby shuvit-tim » 23 Jan 2005, 23:44

i tried 10W40 in my chevette when the 1256 was in as i didnt have anything else and it pissed staright through the gaskets once the engine was warm. I was queued up at a track day and someone knocked on my window and told me there was a big pool of oil under my car :? don't worry about using heavy oil, its designed for it.

My only other advice would be that heavy oil takes a little longer to become really effective as it needs to get warmer. So don't rag/rev the nuts off of her whilst she's rattling.
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Postby Doive » 24 Jan 2005, 00:02

Don't worry, I have a reputation on this forum, probably deserved, of being an old time driver. I fitted a rev counter so I could change gear at 3000rpm, which it turns out I do anyway! I had been told in the past not to use anything like a 10W-40 or anything synthetic only mineral. But I saw a few bottles of 15W-50 today, and not being up to speed with oil marking I wondered aloud in Halfords what the difference was between that and 20W-50? I believe the 15 and 20 are the oil viscosity, but what is the 50?

I'm not too worried about the price as long as its not 30 quid a gallon. Bugger that. I'll have a look around my local factors for that Duckhams stuff. I used to have a Duckhams matchbox curtainsider lorry, it was brilliant. Ah to be seven again.
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Postby Neilyman » 24 Jan 2005, 00:13

Duckhams Q here also, I like the nice Green colour ! :P
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Postby shuvit-tim » 24 Jan 2005, 00:17

it's green!?!? i'm sold!

The transmission fluid I use is exactly the same colour of the sweet and sour sauce at my chinese :? luminous red stuff!
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Postby Tony » 24 Jan 2005, 02:21

Doive wrote:I believe the 15 and 20 are the oil viscosity, but what is the 50?


one is the viscosity when cold and the other is the viscosity when its up to running temperature. im not sure what one is what though :?
if it has pistons or tits, its going to be expensive
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Postby shuvit-tim » 24 Jan 2005, 02:32

well 10 is thinner than 15 so by that kind of thinking, 10 is thinner than 40 so the 10 is when cold the 40 is when warm? (as oil is thinner when hot)

[for thinner ead less viscous :lol: ]

example for 10W40 obviously
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Postby Shoveitpusher » 24 Jan 2005, 09:56

15/50 in the red halfords pack is fine, i use it for engine and transmission, just change it often, i try and do it every 6 months - for transmission every 2 events. the 15 should pick up a bit quicker than 20 grade

Tim your transmission fluid sounds like some auto tranny fluid i used for running in my rebuilt box. looked very tasty it did.

castrol make the old gtx still but call it classic. valvolene is also good. i would steer clear of cheap oils they tend to form black gum on everything and clog up the engine. which is why i use an oil flush every change.
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Postby hsr2.6 » 24 Jan 2005, 19:07

if you have an old engine or a high miler then a can of stp .they done an experiment where they put a canof STP in an engine without any oil and it done around 15,000 before letting go...
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Postby Shoveitpusher » 25 Jan 2005, 09:15

all the additives make these claims for various addatives and i have to admit i have used most of them. i do use one in my 3 competition engines since it takes the 2.3 anything up to 20 seconds to pick up pressure and the other 2 spend a fair amount of time on the rev limiter.

standard stp or wynns is a thickening agent for hot running, probably not worth using these days with the modern oils. i have used the ptfe additives in my swift almost from new and it has a huge mileage on the clock including some serious competition.
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Postby Racer86 » 25 Jan 2005, 09:38

i always use Duckhams Q or Castrol merit 20w-50 and STP, i swear by STP i always use it and when you come to rebuild the engine all the internals are covered in it and it wont come off!
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Postby hsr2.6 » 25 Jan 2005, 18:26

Racer86 wrote:i always use Duckhams Q or Castrol merit 20w-50 and STP, i swear by STP i always use it and when you come to rebuild the engine all the internals are covered in it and it wont come off!


man after my own heart :lol: :lol:
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Postby Tortron » 26 Jan 2005, 02:31

off topic, but do you chaps have the shell oil ad where it goes on about how refreshing and good for you the ocean is... and then something about imagine being able to take your car to the ocean and do the same, with some guy doing an oil change on the beach!
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Postby shuvit-tim » 26 Jan 2005, 04:02

afraid not. doesnt sound like it makes any sense to me though! :P

nopt heard of STP, like the sound of it though! Do you use it as an additive when doing an oil change or as a flush before you replace the oil once you've drained it and changed the filter?

If it sticks to everything in your engine doesnt it clog the oil filter?
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Postby shuvit-tim » 26 Jan 2005, 04:07

answered my own question. for any of you who ae interested and not in the know:

http://www.stp.com/faq_oil.html
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Postby Doive » 26 Jan 2005, 11:26

Good link, I think I might just give STP a go the one in the red bottle. Although I've just noticed their smoke stop additive, I wonder if that can be used as well as the red bottle as I noticed she was a little smoky idling when warm this morning. Perhaps it was just my eyes but the smoke was definitely blue, I'm wondering if this is valve stem seals or piston rings? Stem seals cause blue smoke on startup, so if the rings are worn they will allow oil onto the top of the piston crown while idling. Is this right? Regardless, it will ahve to wait as I am skint and have no time to strip it down.
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