Mobil 1 vs. Castrol 5w30 synthetic

jsech01 · 06-21-2009, 11:58 PM

What does everyone know about the two? I prefer Mobil 1 synthetic myself. Use it in trans, eng, diff even greasables.

z07 · 06-22-2009, 10:25 AM

The logical part of my brain says these oils are both fine products and there's not a dime's bit of difference between them.

The emotional part of my brain keeps me buying Mobil 1 full synthetic for almost everything. (Bike uses a wet clutch so I use their motorcycle oil that is made for that)

I use mobil 1 gear lube in the differentials and their grease on the grease fittings.

I know it seems silly. I can't back it up with facts or science.

http://www.mobil.com/australia-engli...es/Mobil_1.asp

Quote:

Is Mobil 1 a fully synthetic oil?

Yes, it is.

merlin5577 · 06-22-2009, 10:55 AM

Most Synthetic oils are made from the same base stock. The only differences between them is the additives the individual manufacturers add. That being said, in order to be API certified they all have to follow the same basic guidelines during production.

I have used most synthetic oils and can tell you there is very little difference between them. If you have used Mobil 1 with great success, dont mess with a good thing, but if you want to experiment with other ones, feel free.

leolkfrm · 06-22-2009, 12:42 PM

mobil seems to have the better sale people, they show up at lots of events to promote their products. over the years i've never been one to use costrol products

gmctrucks · 06-22-2009, 02:33 PM

Royal Purple is the only one that's pure synthetic.
GMC

merlin5577 · 06-22-2009, 03:24 PM

Quote:

Originally Posted by gmctrucks

Royal Purple is the only one that's pure synthetic.
GMC

Sorry GMC, thats just not true. Royal Purple is a great oil, but there are a number of pure synthetic manufacturers.

gmctrucks · 06-22-2009, 07:52 PM

Merlin your right there is more but not the ones that he listed I made a mistake. I prefer High Mileage Castrol in my truck. They also say that one can run synthetic longer or place more miles on it but I just don't feel right about it I prefer 3000 thousand mile oil changes.

merlin5577 · 06-22-2009, 08:07 PM

Quote:

Originally Posted by gmctrucks

Merlin your right there is more but not the ones that he listed I made a mistake. I prefer High Mileage Castrol in my truck. They also say that one can run synthetic longer or place more miles on it but I just don't feel right about it I prefer 3000 thousand mile oil changes.

GMC, both Mobil and Castrol make Full synthetic oils. I'm kind of confused by what your getting at.....

Its your truck, and your preference, so its all good. Some people just dont like going beyond 3,000 miles. No worries.

gmctrucks · 06-22-2009, 09:00 PM

Merlin im saying that because the bottle of Mobil 1 says it's not all synthetic also this has come up before that some other members were and weren't aware of it that's why im writing what im writing but again they might have come out with a new one.
Be good! GMC
PS-Merlin im so happy right now im going to see my grandkids & daughter I can't wait.

jsech01 · 06-22-2009, 09:09 PM

I am in the auto parts industry. I would have to say that out of the 200 or so plus customers that I see, most prefer Mobil one synthetic. I too prefer Mobil synthetic. I agree that oil is oil. One can simply check the circle on the back of any bottle which shows the API rating which is currently SM. If you see that then your golden. Every brand does have its own additives. I comes down to personall preference. Mobil 1 for life,lol.

06-21-2009, 11:58 PM	#1
jsech01 Full Member Join Date: Jun 2009 Location: Suisun, Ca Posts: 45	Mobil 1 vs. Castrol 5w30 synthetic What does everyone know about the two? I prefer Mobil 1 synthetic myself. Use it in trans, eng, diff even greasables.

06-22-2009, 12:42 PM	#4
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,223	mobil seems to have the better sale people, they show up at lots of events to promote their products. over the years i've never been one to use costrol products __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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06-22-2009, 10:55 AM	#3
merlin5577 Banned Join Date: Nov 2008 Posts: 675	Most Synthetic oils are made from the same base stock. The only differences between them is the additives the individual manufacturers add. That being said, in order to be API certified they all have to follow the same basic guidelines during production. I have used most synthetic oils and can tell you there is very little difference between them. If you have used Mobil 1 with great success, dont mess with a good thing, but if you want to experiment with other ones, feel free.

06-22-2009, 02:33 PM	#5
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 3,945	Royal Purple is the only one that's pure synthetic. GMC

06-22-2009, 07:52 PM	#7
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 3,945	Merlin your right there is more but not the ones that he listed I made a mistake. I prefer High Mileage Castrol in my truck. They also say that one can run synthetic longer or place more miles on it but I just don't feel right about it I prefer 3000 thousand mile oil changes.

06-22-2009, 09:00 PM	#9
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 3,945	Merlin im saying that because the bottle of Mobil 1 says it's not all synthetic also this has come up before that some other members were and weren't aware of it that's why im writing what im writing but again they might have come out with a new one. Be good! GMC PS-Merlin im so happy right now im going to see my grandkids & daughter I can't wait.

06-22-2009, 09:09 PM	#10
jsech01 Full Member Join Date: Jun 2009 Location: Suisun, Ca Posts: 45	I am in the auto parts industry. I would have to say that out of the 200 or so plus customers that I see, most prefer Mobil one synthetic. I too prefer Mobil synthetic. I agree that oil is oil. One can simply check the circle on the back of any bottle which shows the API rating which is currently SM. If you see that then your golden. Every brand does have its own additives. I comes down to personall preference. Mobil 1 for life,lol.