Oil grades

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Perhaps I should change my name to fair weather friend, cause I only seem to come by these parts looking for help/advice, and am a bit scant in offering help in return!! but... anyway...

I'm about to change the oil in my car, last time I changed it I put in a summer grade, (20/40W).

but obviously we are just in january comming up to the bleakest months of winter, (though I am only in england so it's not all that bad)...

i was just wondering, (cause it's actually quite hard to find out and decent information on this!).

what sort of oil grade I should be using for the winter, I have a fairly old (1990) unleadded engine, (naturally aspirated).

I live on a firly busy road, (and park on the road) so when starting in the morning, It's pretty much a start straight into reasonably fast traffic, so there is no real hanging around waiting to warm up possible.

any help is greatly appreciated.


posted by  danny_boy

Well, uh, no... Why?

1. Because he's in England and you're not. You don't have that info readily at hand so you would have to search the web to find it. So...

2. Instead of you having to do his homework, he should be doing it himself. And besides...

3. You've already answered the question. Based on the manufacturer requirements for his year, make, model, engine and climate, the recommended specifications are already in place.

Face it. He has to go to Halfords (or wherever) to get the oil and filter anyway. They have the info on their computer just like every big box parts retailer in the states does. Can we stop spoon feeding and let these people stand on their own two feet?

Note the sentence right above the first picture. Nuff said.

http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_cat alogId_10651_productId_172283_langId_-1_p1_38270_p2_31276

posted by  vwhobo

No offence.
but I didn't ask you to be a complete arse about it.

I quite specifically said that I had done research on the subject, but found most of the information on the subject a little confusing as to what would be the best solution.

I realise that this isn't a forum of people being paid to answer questions, but if there was nothing good to say you could have just shut the hell up and left no replies at all.
perhaps you could have stayed in the social sections and just talked about what cars were pretty?
maybe there should be a banner saying that this is an exclusive place, where if you ask a basic fundamental question, (for the answer of which is actually reasonably hard to find on the internet) that you'll be shot down for it...

and RE
Perhaps it doesn't occur to you, but halfords hasn't exactly reached every corner of the UK yet, and there isn't a halfords in the town where I live, hence I've gone to the local auto centre, (a small town cetre shop) where they don't have those pretty little cards thart tell you what to use. (and besides, even if the cards tell me what oil to use, they still don't tell me what viscocity of oil I should be using at the temperature ranges).

perhaps this is what confused me, from all the 'homework' that I did do, I got the impression that there wasn't such a thing as a one size fits all, just use this all the time oil, especially when you think about the difference in temperature for different times of the year and how that effects the oils starting viscocity.


According to the bottles in the local shops there are a couple of oils that will suit the job.
it's a small, manual, naturally aspirated petrol engine, So I've immediatly discounted all injector specialised, forumlated synthetic and specialised for injector engines bottles of oil.

this leaves me with a few choices.

or 20w50

all natural oil, for naturally aspirated petrol engines

I know, (cause I did do my own homework) that the w indicated viscocisty at a freezing temperature, and that ideally a lower number is better for all round winter protection.
However I also know that a thicker oil (lower W rated) will be pumped faster and under more preassure by the pump (simply by the sheer mechanics of the pump in that it is more efficiant at pumping thicker liquids), and hence works to raise the engine temperature. (simply because it preassurises the oil, and we all know that preassurising something heats it up right?

so as I said, at the moment I have a summer grade oil in the engine(20w50).

obviously I realise that as I said, as the cold is being sceduled to draw in I should probably change to a more winter grade oil...

the question being what sort of grade should I be looking for,
will going for something as low as 5w30 be a stupid idea cause it simply won't get that cold,
or given what I said about the quick start into fast traffic should I opt for the extra level of engine wearing protection that this could give me? will it even give me that?

for what it's worth, I've somewhat settled on using 10w40, unless anyone can give any good reasons for not using that?

posted by  danny_boy

If they haven't reached your part of the country by now, they probably aren't going to, lol

posted by  Cliffy

No you didn't, but I thought I'd return the favor.

You did? Can you show that to us in the first thread? I can find words like "help" and "advice" and "firly", but I can't find the word "research" at all. Must be my computer.

Maybe if you're incapable of asking a well thought out, comprehendable question, you should stay off this forum entirely. People here ARE willing to help, but that help starts with you. Oh, wait a minute. You're helpless. I got it.

Did you read my post, or were you too busy with your boyfriend getting your panties in a wad. Look at what I said dildo;

That means you might have to go somewhere other than Halfords. It's quite a simple concept actually.

Really? Why's that genius? What do you think the purpose of multi-viscosity oil is, so the manufacturers can put fancy numbers on the bottles?

Why? or is this based on some super secret knowledge that only you have?

Notice the highlighted words. WTF are you talking about? A lower viscosity rating now equals thicker oil? When did that happen? Has anyone notified the SAE? No wonder you don't have a Halfords nearby, you live in a parallel universe. And you get an F- on your homework. Better luck next time.

Blah, blah, blah... Perhaps instead of changing your name to "fair weather friend" you should try "annoying pinhead". The problem we have here is that you're trying to over think the entire situation... Something you're not even remotely equipped to do. In no particular order;

1. The very first person to respond to you asked for specifics (make, model, engine) about your car, and the best you can come up with is "it's a small, manual, naturally aspirated petrol engine". I can't find that make, model or engine in any manual or online resource. If you're not even willing to help yourself, I'd say you're about f*cked.

2. No matter how much you want it to be so, a lower viscosity index does not indicate a thicker oil. Get that through your high viscosity skull. As a matter of fact, you deserve two F-'s for doing your homework poorly.

3. I'm tired of typing so I'll end with this. You need to lose the attitude and stop biting the hand of those you want help from. I don't give one red rat's ass if you ever get your oil change accomplished, and I don't have time for stupid people. So here is your answer, which has already been basically given twice.

USE THE MANUFACTURERS RECOMMENDED OIL FOR YOUR VEHICLE. YOU CAN GET THE INFORMATION FROM HALFORDS (OR WHEREVER), A SERVICE MANUAL OR THE DEALERSHIP. This is very simple to do. It would be even easier if you pulled your head out of your ass (proper spelling).

posted by  vwhobo

lets all just relax. No need to get mad at the poor guy.

posted by  corey vette 78

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