castrol edge which weight

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nazareth

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im going to try the castrol edge. its 34 bucks for 5 quarts at walmart.
i have 2 vehicles 04 mustang with a 3.9l80k miles calls for 5w20 always runs 5w30 so i will run 5w30 with a motorcraft oil filter.

my truck is a 93 f150 with a 4.9l has 180k miles. always ran 10w30. im thinking of going to 5w30 castrol edge over the summer and sticking with that weight.. i live in phoenix area so we have high temps.110F+. 5w30 should be good with 6k ocis. motorcraft oil filter. probably beating a dead horse but i cant decide 10w30 or 5w30. help me out with this stupid decision
 
no short trips. definitly no freezing.
10k ocis even in the extreme heat out here also drive through the mountains with a cabover alot in the summer time. you think it will go 10k ocis under these conditions?
 
"10k ocis under these conditions? "

There aren't any UOA's to really know. Maybe... All I know is for 34 bucks, I'll let someone else do the dirty work. Come april first, 5qts of M1 for 16 bucks after rebate sounds better to me, especially if I were changing at 6000 miles.
 
not a fan of mobile one. i dont trust anyone else to work on my vehicles besides i enjoy changing my oil
 
IMO, short trips and freezing weather worse on oil than high temps and towing. At least you are keeping the contaminants burned off. The synthetic oil and higher quality adds (vs conventional or regular syn) are gonna help with the higher heat issues. If they allow a 15k mile oil change under ideal conditions, then I don't think that 10k miles is such a stretch with a bit of high heat interstate driving. To know for sure, you would need to have the oil tested, especially since not much collective experience with this oil yet.
 
There is NO reason to go with 5w30 in your case. You would see zero benefit from an oil with more polymers to aid with cold start flow properties. 10w30 without a doubt for you.
 
Originally Posted By: Gilitar
There is NO reason to go with 5w30 in your case. You would see zero benefit from an oil with more polymers to aid with cold start flow properties. 10w30 without a doubt for you.

How about energy saving formula? (better gas mileage).
 
Looks like a coin toss to me -- either one will meet you needs.

Synthetics don't have to use as many polymers to make a 5W30 oil as conventional oils do. My choice is the 5W30. I use 5W30 in all my stuff including a Dodge with a 5.2 that I use to pull a car and trailer.
 
Dr. Haas would say the 5w30 is always a better oil than 10w30. Overnight in Arizona gets pretty cold, the oil will still be too thick at startup. Running a modern synthetic, if ur paying money for Edge, I would buy the 5w30 for the ultimate. Castrol typically is a nice thick oil anyway, for any given weight. Be sure to check ur cooling system though. IMO.
 
Originally Posted By: scoobie
Dr. Haas would say the 5w30 is always a better oil than 10w30. Overnight in Arizona gets pretty cold, the oil will still be too thick at startup. Running a modern synthetic, if ur paying money for Edge, I would buy the 5w30 for the ultimate. Castrol typically is a nice thick oil anyway, for any given weight. Be sure to check ur cooling system though. IMO.
10w-30 dino is good to probably 0*F syn should be better. Dr Haas as brilliant as he is gets silly on some aspects with his motor oil theories.
 
for example Edge 0W30 is recommended for Mercedes VW GM BMW:
Castrol EDGE 0w30 is Castrol's latest generation technology, high performance engine oil.

It is a fully synthetic, 0w30 viscosity engine oil which meets a wide range of Mercedes, General Motors, BMW and VW specifications.

If it protects those engines, then the Ford will be easily protected as well. Remember, Mercedes and BMW typically are used on Autobahn, driven at constant 100mph for hours on end. I would not spend the money unless I were buying the 5w30. 5w30 gives you the benefit of this superior oil, more than a 10w30. this oil is a completely different class, and is fully synthetic, and designed to last for EXTENDED oil changes. Mercedes oil changes, if I remember well, are 12000 to 15000 miles.

And i disagree a dino 10w30 is "good" at 0F. I just changed the oil yesterday at 32F, and even the synthetic 5w30 was pouring slowly, compared to the "dino" 5w20, which is really a II+. A dino 10w30 has a lot of group I, and is like honey at 0F.
 
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5w/40 HDEO syn would work great in the F150 If you think the oil temps are really hot. Syn oils hold up in higher operating temp.
 
i was thinking of maybe using like a rotella 5w40 this summer for my f150.i will probably either use 5w30 or 5w40. would never go over 5k-6k ocis. just a personal preference ive seen some stuff in the military that would keep me away from extended ocis especially in the heat and under high load conditions.
 
If you are interested in the Rotella T 5W40, it is likely the best choice for a lot of heavy towing in the heat. You could use it year around and not worry about changing weights for summer and winter.
 
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