0w 40 Mobil 1 in 65 Mustang

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Originally Posted By: JLR
Because of ease of flow on start up; would using 0w40 Mobil 1, in a '65 Mustang, be a good choice?


Great choice...
cheers3.gif
 
Old wives tale??? Thank you for letting me know the truth and to think that for the last 22 years i owned an engine shop with 14 employees and learned nothing about engines.

I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.
 
Originally Posted By: crazyoildude
Old wives tale??? Thank you for letting me know the truth and to think that for the last 22 years i owned an engine shop with 14 employees and learned nothing about engines.

I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.

What's different about those motors than the ones that use synthetics? Do flat tappet cams not like syntethic oil?
 
Originally Posted By: semaj281
What's different about those motors than the ones that use synthetics? Do flat tappet cams not like syntethic oil?


Per se, they don't care any more than if it were low ZDDP conventional. The only reason I would shy away from synthetic in an older vehicle (carbed) is fuel dilution, which means more oil changes with an expensive oil. Any other reason to avoid synthetics, as a broad category, is utter hogwash. If it doesn't make financial sense, you don't do it.
 
Originally Posted By: crazyoildude
Old wives tale??? Thank you for letting me know the truth and to think that for the last 22 years i owned an engine shop with 14 employees and learned nothing about engines.

I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.


My father had one for 50 years(and I worked there for over 10) and never had a problem with synthetics when he switched to em other than his engines tended to last longer. If a seal is bad or on its way out, its the only way synthetic will cause a leak. Just like the old wives tale to break a motor in with conventional, which is obviously not a problem since many cars come factory filled with synthetics. I think he knows what he is doing with engines since he held two AHRA record setting Chevy motors in his lifetime.
 
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OMG, I can't believe we're still saying no synth during break in.

But even I start my rebuilds on conventional. Why? Because I'm likely to dump it twice in short order.

Then it's synthetic for the full OLM suggested interval.
 
Originally Posted By: crazyoildude
Old wives tale??? Thank you for letting me know the truth and to think that for the last 22 years i owned an engine shop with 14 employees and learned nothing about engines.

I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.


That's what I always thought...

I worked closely with Exxon Mobil for 3 years and they have always warned that seals in older engines (pre 80's) are not compatible with synthetics while always recognizing in newer engines that leaks are not caused by synthetics but most likely due to an engine that more or less needs repair work.
 
Originally Posted By: Flying_A
Originally Posted By: crazyoildude
Old wives tale??? Thank you for letting me know the truth and to think that for the last 22 years i owned an engine shop with 14 employees and learned nothing about engines.

I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.


That's what I always thought...

I worked closely with Exxon Mobil for 3 years and they have always warned that seals in older engines (pre 80's) are not compatible with synthetics while always recognizing in newer engines that leaks are not caused by synthetics but most likely due to an engine that more or less needs repair work.


Castrol says it wont affect older seals at all as long as the seals are in good condition. I ran synthetic in my 1970 Nova with the original motor and had no leak issues and I am currently running it in my 86 Monte Carlo SS with no issue either.

http://www.castrol.com/castrol/genericarticle.do?categoryId=9014502&contentId=7017050
 
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Originally Posted By: crazyoildude
Old wives tale??? I would not use synthetic in those motors no matter what people tell you.. If you do you will have problems in the near future.


I have been running synthetics in all my old iron (since the 80's staring with Amsoil and have not experienced any leakage. I currently have all my engines on different oils....6.9, 5.2, 5.9, on various oils such as Mobil 1, Amsoil, Valvoline, etc. Have not had any (problems) some minor weaping, but nothing that bothers me. Just yesterday, I switched out the 20w50 synpower on the 318 (5.2) for Mobil 1 0w40.
 
Originally Posted By: LargeCarManX2
I switched out the 20w50 synpower


How`d you like the 20W50 Synpower?
 
I tried the Mobil1 15w50 in my 65 Mustang. No leaks from synthetic. However, that oil was just too thick at startup and even up to operating temperature. The valve/lifter train was very noisy almost all the time. Stock 289 w/50k miles. I have found 10w30 to be ideal in mine, specifically the Brad Penn racing version. Though i did run M1 10w30 for 1 year and it was fine.
 
I own a 65 Mustang convert and it still has its original paint and its numbers matching 289(59K miles). I use Mobil 1 HM 10W30 and am very pleased with how it runs... These engines were specd for a 30 weight oil. Have also used PYB 10W30 with a zinc additive...
 
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Originally Posted By: aquariuscsm
Originally Posted By: LargeCarManX2
I switched out the 20w50 synpower


How`d you like the 20W50 Synpower?


I liked it, worked great.....no complaints at all.

Update, I am really impressed with the Mobil 1 0w40, it has been 10 degrees in the morning and the engine starts with ease.
 
Originally Posted By: JLR
Because of ease of flow on start up; would using 0w40 Mobil 1, in a '65 Mustang, be a good choice?


Tell the board a bit more about the condition of the engine, e.g.

Original?
Rebuilt long ago?
Rebuilt recently?
Total Miles?/Miles on rebuild?
Etc.???
 
Originally Posted By: JLR
Because of ease of flow on start up; would using 0w40 Mobil 1, in a '65 Mustang, be a good choice?
I don't see a problem with it.
 
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