5w-40 vs 0w-40
02-17-2006, 12:17 AM
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5w-40 vs 0w-40 hey guys i have ran mobil 1 5-30 full syn in my z28 since it was new but i switched over to mobil 0-40 right before i put it away for the winter and what im wondering is would i be better off running the 0-40 or the 5-40? i know i have alittle bit longer before i can start driving it again but i was just wondering. TIA 
02-17-2006, 05:47 AM
#2
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Mobil 1's 5w40 is a better oil than their 0w40. Their 0w40 tends to thin out pretty quickly. (although it's still a better choice over their 5w30 or 10w30)
02-17-2006, 06:48 AM
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Patman, since all the Walmarts around me have discontinued the M1 5/40, I can't seem to find it at all. I've since gone to the German Castrol 0/30 (as you know, with great results).
02-18-2006, 05:32 AM
#5
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Originally Posted by 02SS#406
Patman, since all the Walmarts around me have discontinued the M1 5/40, I can't seem to find it at all. I've since gone to the German Castrol 0/30 (as you know, with great results).
02-18-2006, 06:49 AM
#6
The mobil 1 5-40, is that the truck.suv one that you are talking about? I have never seen 5-40 in the older style containers, but there is a 5-40 that is for trucks/suv's or something. If that's the right one, I'll go to that, I just want to make sure.. as that castrol oil is nowhere to be found here in CT, I have looked for it a ton of times, and never find it anywhere. I ahve been running the 0-40 and have had no problems, consumption has gone down alot from when I was running 5-30, it'a about non existant now. if the 5-40 is better, then I'll go to that, as the one I spoke about above is available around me all the time.
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02-18-2006, 10:07 AM
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The Truck/Suv 5w-40 is the one in question. It seems most everyone has cottoned on to it and it's become hard to find now.
Wal-Mart only gets so much, and then you'll have to wait for the next shipment. I got two jugs last time it came in. Sorry for the other guys, but gotta take care of my own...
It has become rather common knowledge that Mobil 1 oils are a bit thin for their weight, making the 5w-40 fall within (Patman) recommended oil weights for a 30w. I believe that while the weight numbers are good, better oil analysis results are had from the new Castrol as well as the hard to find German Castrol. I don't recall analysis numbers from 5w-40 Mobil 1 being put up against the two Castrols, so a direct comparison may not yet have been made.
Wal-Mart only gets so much, and then you'll have to wait for the next shipment. I got two jugs last time it came in. Sorry for the other guys, but gotta take care of my own...
It has become rather common knowledge that Mobil 1 oils are a bit thin for their weight, making the 5w-40 fall within (Patman) recommended oil weights for a 30w. I believe that while the weight numbers are good, better oil analysis results are had from the new Castrol as well as the hard to find German Castrol. I don't recall analysis numbers from 5w-40 Mobil 1 being put up against the two Castrols, so a direct comparison may not yet have been made.
02-19-2006, 12:45 AM
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Originally Posted by JL ws-6
The mobil 1 5-40, is that the truck.suv one that you are talking about? I have never seen 5-40 in the older style containers, but there is a 5-40 that is for trucks/suv's or something. If that's the right one, I'll go to that, I just want to make sure.. as that castrol oil is nowhere to be found here in CT, I have looked for it a ton of times, and never find it anywhere. I ahve been running the 0-40 and have had no problems, consumption has gone down alot from when I was running 5-30, it'a about non existant now. if the 5-40 is better, then I'll go to that, as the one I spoke about above is available around me all the time.
02-19-2006, 06:40 AM
#11
That's the thing, I'm not sure if there is or not. I know that there's the truck/suv formula that is 5-40, which is what I am wondering about.. is it the only one, is it fully synthetic? If it is, great, I can get that alll day long, but if it's not, and there's another one, then I have yet to see that anywhere.
02-19-2006, 08:32 AM
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I was told at 3 of my local Walmarts, that they have discontinued the M1 5/40. They didn't know if Walmart stopped handling it, or M1 stopped making it (doubtful). My stores will no longer stock it... 
02-19-2006, 11:40 AM
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Originally Posted by 02SS#406
I was told at 3 of my local Walmarts, that they have discontinued the M1 5/40. They didn't know if Walmart stopped handling it, or M1 stopped making it (doubtful). My stores will no longer stock it...
02-19-2006, 06:45 PM
#18
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Originally Posted by 02SS#406
I've always heard good things about Amsoil. I'm sure Patman is more familiar with it, and would have hard data.
02-21-2006, 09:50 PM
#19
Originally Posted by JL ws-6
as that castrol oil is nowhere to be found here in CT, I have looked for it a ton of times, and never find it anywhere.
hehe I found it man. Autozone carries it.. always a full shelf in Middletown Autozone on rt. 66 next to Wendy's. Took me forfreakingever to find that ****!
02-21-2006, 09:52 PM
#20
Originally Posted by JL ws-6
Funny, wal marts here in CT have it all the time.