Author Topic: Unsure of engine oil to use.  (Read 6683 times)

muncher

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Unsure of engine oil to use.
« on: April 25, 2010, 01:38:30 AM »
Hi all. My first question.
I have a  1967 Mustang 289 arriving soon. I don't know much about the history of the engine. I live in New Zealand and the car is from California. So only got the basics.
What oil would you suggest i use. I thought maybe 10w40w Synthetic???
However i read somewhere that new oils are made for new Catalytic cars. These oils contain less Phosphorous because it reacts with the cats and emmisions. We need the Phosphorous to reduce the wear on our cams etc. So do you all also use an additive?
Thanks ......muncher

Tim175

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Re: Unsure of engine oil to use.
« Reply #1 on: April 25, 2010, 01:48:57 AM »
First welcome to the site, and congrats on the new mustang. Personally i have never been a fan of synthetic, especially on old motors, high mileage motors, or fresh motors. Never heard anything but bad about it. Glen (Soaring) and several others on this site use it and say they love it. Its all about opinions i guess.

6mustang6

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Re: Unsure of engine oil to use.
« Reply #2 on: April 25, 2010, 08:57:46 AM »
Synthetic oil is great when you use it right. What I mean is, a low miles engine. IF you got 200,000 and switch to a synthetic oil, it can cause leaks, etc. Now It's best to start using after a fresh rebuilt, so break it in with regular oil, and then after the first or second oil change start using synthetic oil. It will prolong engine life!

66GTKFB

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Re: Unsure of engine oil to use.
« Reply #3 on: April 25, 2010, 11:56:37 PM »
I've used regular oil for xxx years (too many to count). If you change oil and filter every 3,000 miles, you won't have any oil related problems. I got on the STP kick a long time ago until STP was found to be of little advantage, so don't bother with addatives. There are some that swear by Deisel engine oil as it has zinc in it. Don't know if it's good or not.
Jim

6mustang6

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Re: Unsure of engine oil to use.
« Reply #4 on: April 26, 2010, 07:48:08 AM »
Diesal oil is good too. I was just stating that you might not have any problems with regular oil, but it's been tested and proven that synthetic oil holds it's lubrication properties alot longer then regular oil. Lubrication equals a happy  engine... and well happier other stuff not related to engines. ;D

Tim175

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Re: Unsure of engine oil to use.
« Reply #5 on: April 26, 2010, 11:28:33 AM »
I use diesel oil in my 460 in my truck and it has worked well. Never had a problem with it.

Soaring

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Re: Unsure of engine oil to use.
« Reply #6 on: April 26, 2010, 05:02:09 PM »
You get wear on your engine caused by friction.  Synthetic oil causes less friction, therefore less wear.  I swear by synthetic in both my 65 and my 03 Mach, and my 03 F-150 Lariat with a 4.6 engine.  I swear I picked up a few ponies by switching to Mobil 1 in my 289 that had about 140,000 miles on it when I switched from Pennzoil dino, and had no leaks.  If you do get some seapage, your gaskets will leak for awhile then seal because the gaskets will swell.   Jim and I are from the old school in many ways, but after studying the positive effects of synthetic over dino, I switched and love it.  You can't go wrong with continuing to use dino, but like Jim said, you have to change it every 3K miles.  I take my synthetic for around 5-6 K before I change it, and it is still golden when I change it.  My Pennzoil was damn near black at 3K miles when I changed it before.  Synthetic if far superior to dino, and the falsehoods are still out there that old high mileage motors should stick with dino. That's absolutely not true.  Do some research and you will see what I mean. 

muncher

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Re: Unsure of engine oil to use.
« Reply #7 on: April 30, 2010, 04:05:10 PM »
Thanks for the replies guys.
What about the low Phosphorous in the synthetic oils? This is done because phosphorous reacts with and lessens the cat life of our modern cars. So because of this i was told to use an additive with phosphorous in it if synthetic oils are to be used in older engines. The phosphorous helps reduce the wear on our engines.
What visc would you use in a moderate climate, 20w 40w?
Thanks again guys.

6mustang6

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Re: Unsure of engine oil to use.
« Reply #8 on: April 30, 2010, 04:37:40 PM »
They wouldnt sell an oil that would tear up an engine.... No matter what they took out of it, synthetic oil is still better then regular oil.

Soaring

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Re: Unsure of engine oil to use.
« Reply #9 on: April 30, 2010, 08:35:46 PM »
Absolutely.  Synthetic is the best oil you can run in any  engine. 

Tim175

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Re: Unsure of engine oil to use.
« Reply #10 on: April 30, 2010, 11:36:53 PM »
I switched my dads suburban with 165k miles on it to some synthetic high mileage yesterday and im going to see how that works out.

muncher

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Re: Unsure of engine oil to use.
« Reply #11 on: May 01, 2010, 01:02:25 AM »
Tim will be keen to hear how you get on. My feeling is to convert to semi synthetic first plus an additive. Then go to full synthetic. I agree that synthetic is far superior to the old stuff. Only not sure synthetic has the anti wear properties suitable for older non catalytic engines. Its like when the fuel went from leaded to unleaded. lots of older engines needed lead additives to the fuel. Burnt valves etc would result if not used. Had to use additives when filling up my old Valient.
So you guys using full synthetic i guess you have no excessive wear issues?

Tim175

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Re: Unsure of engine oil to use.
« Reply #12 on: May 01, 2010, 01:42:09 AM »
Yeah i will give an update in 3,000 miles, which with the way we drive in my family, should be very soon.

6mustang6

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Re: Unsure of engine oil to use.
« Reply #13 on: May 01, 2010, 08:07:42 AM »
Muncher, I dont see how i can explain this to you..... Ok heres a try. there's no difference in a engine that has catalytic convertors on it or one that does not. You keep acting like synthetic oils are for new engines and conventional oil is for old engines. People with new cars use regular ol oil too. You dont see there engines messing up. It's just a personal choice for most people to use synthetic oil. Some cars say they require it though. The only problem is, you might get some leakage going to a synthtic oil. Glen says it will quit, and if thats true, thats a good thing. Im going to start using synthetic is my 66 stang. When i pulled the top end there was just oil sludge and stuff everywhere. I had been using cheap oil because it was leaking it out. I wont do that again.

Soaring

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Re: Unsure of engine oil to use.
« Reply #14 on: May 01, 2010, 02:51:38 PM »
Regarding switching from leaded furl to non-leaded fuel, I use a lead additive from Redline.  I only use a few caps full at each fill up.  I don't really know if it cusions the valves or not, but I have been using non-leaded gas ever since it came out and I have had no burnt valves.  I think that's another wive's tale.  If I ever have to overhaul the heads, it will be with hardened valve seats, but for now, I have no problems.  As far as the phosphorus in the oil, I can't see the advantage, because even dino oils mostly don't have it.  I think diesel oil and maybe a few others do anymore, but to assume that all dino oils have phosphorus in them is not true. 

muncher

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Re: Unsure of engine oil to use.
« Reply #15 on: May 01, 2010, 03:43:26 PM »

Hi there
Found this article that may explain where i am coming from.

http://www.aa1car.com/library/motor_oil_additives.htm

Cheers.

Soaring

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Re: Unsure of engine oil to use.
« Reply #16 on: May 01, 2010, 04:18:09 PM »
Thanks for the article Muncher.  I guess we are damned if we do and damned if we don't.  The most important thing we can do is to change our oil and filters  on a regular basis no matter what oil we use.  My old '65 just loves Mobil 1 with either a Wix or a Motorcraft filter.  I've been using it for awhile now, and I get no clatter or apparent wear issues.  Just find something that works and stick to it. 

BlackShadow

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Re: Unsure of engine oil to use.
« Reply #17 on: May 01, 2010, 06:30:00 PM »
Muncher
That is the exact reason I use mobil 1300 delvac 15-40 because of the cam trouble. 1300 is a diesel motor oil  but works great in older gas rigs I buy it in 55 gallon barrel and use in all my rigs, and being on a farm I have many many older gas rig and the worn cam thing is something I have been aware of since 2007 when they took ZDDP out of the oil. What will happen is your car will sound fine but over time the cam wears down and you lose your cam lift. You will not get any chatter or noise just slowly over time closes your valves.  If I used synthtic oil in everything it would break me ... haha  and I'm not sure it the right thing to do.   The trucker call 1300 the million mile oil.

6mustang6

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Re: Unsure of engine oil to use.
« Reply #18 on: May 01, 2010, 10:06:21 PM »
but as you see, it didnt say that SYNTHETIC OILS didnt have the ZDDP but MODERN OIL. That means all oil. Mobil one synthetic shows API ratings for SL... so it should be fine to use in a older engine. Just because they took out ZDDP doesnt mean they didnt put other anti wear agents in. synthetic oils have more anti wear agents then non synthetic.

muncher

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Re: Unsure of engine oil to use.
« Reply #19 on: May 02, 2010, 02:12:48 AM »
Thanks for all the feedback. For me i think i will use a semi synth first then onto a full synth later on. In each i will use an additive at each oil change.
Just need my Mustang to hurry up and get here!!!!

 

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