Going full synthetic (I want to good/bad)

JerZeyStangz

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I am running Mobil 1 10w30 right now and im gonna be do for an oil change in a few months so i want to know...if i got 5w30 will i be ok? the car has 68k on it right now...so tell me the good and bads guys....

Nate
 

Dalamar

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Might run a little bit hotter, otherwise it will be fine :)
 
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JerZeyStangz

JerZeyStangz

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Dalamar said:
Might run a little bit hotter, otherwise it will be fine :)

I never knew the oil can make the car run hotter, meaning will i see a difference on temp guage on dash or like if i open the hood i will feel more heat?
 

wytstang

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5w30 will be fine and you won't run hotter there is no reason for it.
 

Dalamar

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Snakebit said:
Dalamar said:
Might run a little bit hotter, otherwise it will be fine :)

never heard that before ???
My bad my bad.
My motor builder was telling me about running 5W vs 10.
I thought he said it could get hotter on worn motors... I asked him again. Nope.
Said it might burn some oil since it's thinner.

Sorry for the confusion.
 

FaStStAnG5-0

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all i've ever used in my stang since i bought it was 10w-30 royal purple & k&n oil filters...

ok now commence with the high roller comments..but when it comes to my engine a little extra cash at oil change time has never hurt ya know! :thumb:
 

Lightning Struck

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Dalamar said:
Snakebit said:
Dalamar said:
Might run a little bit hotter, otherwise it will be fine :)

never heard that before ???
My bad my bad.
My motor builder was telling me about running 5W vs 10.
I thought he said it could get hotter on worn motors... I asked him again. Nope.
Said it might burn some oil since it's thinner.

Sorry for the confusion.

:lol: :lol: :lol: :lol:
 

drifts14x

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If you want to make the switch, do a synthetic blend oil change first, this will help condition the seals for a full synthetic. Older engines tend to leak if you just dump Synthetic oil in them. Some of the Fords call for 5w-20, but the early 4.6 and late 5.0's call for 5w-30. Lighter weight oil reduces drag on the engine resulting in increased fuel efficiency and performance. Just a thought. I run Pennzoil Platinum 5w-20 in my 1995 5.0 GT and it works great. No leaks, no decrease in fuel efficiency, no excess heat.
 

killagt

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hell i ran 15/50 mobil 1 with motorcraft filter, no complaint yet for the summer :dancing6:
 

Downshift

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drifts14x said:
If you want to make the switch, do a synthetic blend oil change first, this will help condition the seals for a full synthetic. Older engines tend to leak if you just dump Synthetic oil in them. Some of the Fords call for 5w-20, but the early 4.6 and late 5.0's call for 5w-30. Lighter weight oil reduces drag on the engine resulting in increased fuel efficiency and performance. Just a thought. I run Pennzoil Platinum 5w-20 in my 1995 5.0 GT and it works great. No leaks, no decrease in fuel efficiency, no excess heat.

The 94-95 Mustangs take 10w30. Are you talking about later as in explorers and such?
 

i_love_my_stang

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i use 10-30 just a regular oil, when i used 5-30 my car ran like shit, worse gas milage and burned it faster, also it would leak and burn synthetic, im just gonna stay with 10-30 i wouldnt ever try 5-30 again
 

Fastfox400

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I have always used 10w30 on everything except where the manufacturer has called for something else. On my 97 F150 i use Ford 5w20 Synthetic blend because thats what it calls for. Now the cobra i use 10w30 Royal purple With a Mobil 1 filter. Yes i agree with spending more money on oil as is it has a important job. You get what you pay for. Now on a new engine depending on how tight the clearences are i would start with 5w30 dino ooil for the breakin period an the first 500 miles, then i would switch to a 5w30 synthetic blend for the next 3k miles then switch over to full synthetic 10w30 depening on what climate you thing in.
 

zero_chance

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Oil is dependant on climate. The 5w and 10w are in relation to how the oil acts in very cold weather. I live in the northeast and 5w 30 is the norm up here. Though Ford issued their oil change job aids years ago stating the 5 liter can use 5w 20. I have the hard copy at my dealership. I still run 5w 30 but Ive been running Royal Purple for some time now. Switching to a full synthetic can sometimes make seals and gaskets leak as the oil has a natural solvency that cleans up buildup and can expose hidden problems like a worn seal. Check out Royal Purples website for more info and lots of tests that prove thier claims.
 

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