Is Castrol Edge 10w30 improved over GC 0w30

[Quattro Pete]

Originally Posted By: unDummy

I prefer the highest HTHS value in an oil

What is Castrol Edge 10w-30's HT/HS value?

Anyway, since this oil meets ACEA A1, this means its HT/HS must be below 3.5. On the other hand, GC meets ACEA A3, which means its HT/HS is 3.5 or higher (3.6 according to some earlier specs). So, if you prefer an oil with the highest HT/HS, then why are you running Edge 10w-30 instead of GC?

Or were you just referring to 10w-30 grade in general, not specifically Castrol Edge?

 

[ryland]

The castrol is the best oil I've used Im my Honda element (5w30) and in my 09 Hyundai Sonata (10w30). If you look at the numbers the edge 10w30 is not much thicker than the 5w30. I cant remember why I chose to use 10w30 over 5w30 because I made that choice about a year ago? But what I can tell you is that it works great and my engine is very quiet and dosent idle rough at startup and is never sluggish. Your talking about a 10w30 that is thinner when cold than most dino 5w30's.

 

[addyguy]

I don't even understand WHY we are comparing GC 0W-30 and Edge 10W-30 to begin with - two TOTALLY different oils with different purposes!

 

[d00df00d]

Originally Posted By: addyguy
I don't even understand WHY we are comparing GC 0W-30 and Edge 10W-30 to begin with - two TOTALLY different oils with different purposes!

+1

 

[Quattro Pete]

Yeah, that too.

 

[shpankey]

I didn't realize we were. One person brought it up (along with M1 0w40) sort of as a direct response to OP.

 

[JSRT4]

Originally Posted By: addyguy
I don't even understand WHY we are comparing GC 0W-30 and Edge 10W-30 to begin with - two TOTALLY different oils with different purposes!


well because when you go to a retailer near you there are two versions of Castrol synthetic oils to choose from. One is a newly advertised product and one is an older formulation. Both are 30 weights which can be used in similar conditions. A simple question asked to discern if the new Castrol Synthetic has any advantages over the older Castrol synthetic. That's all.

 

[d00df00d]

I think the wording of the question makes it sound like you think one is a newer version of the other. That's obviously not true. Yes, they are both xw-30s, both from Castrol, and both synthetic, but they are still formulated for different purposes. Comparing the two is like comparing an old F150 to a new Taurus. It's not really a matter of which one is "improved," and the fact that one is newer isn't really relevant. It's more about which one is more appropriate to your application.

As long as you're aware of that, all is well.

 

[mattd]

Originally Posted By: ryland
The castrol is the best oil I've used Im my Honda element (5w30) and in my 09 Hyundai Sonata (10w30). If you look at the numbers the edge 10w30 is not much thicker than the 5w30. I cant remember why I chose to use 10w30 over 5w30 because I made that choice about a year ago? But what I can tell you is that it works great and my engine is very quiet and dosent idle rough at startup and is never sluggish. Your talking about a 10w30 that is thinner when cold than most dino 5w30's.


Have you ran into any issues running the 5w30 in your honda? What type of climate? I am having issues finding 5w20 edge in any parts stores around here and would like to use in my 07 accord.

 

[ryland]

No issues at all! You should try it out, its the best oil I've found for the honda. Honda 5w20 is more like a 5w30 in viscosity anyways so this isent a big stretch. It really quiets down the engine noise. Im not sure about the accord but the element uses a timeing chain and is a noisy motor and this oil definatly makes it better. Also I use the honda oil filters but use what you want I suppose, I mostly use them for the gasket design that makes it impossible to over tighten.

 

[jtaylor]

So what's better for what. Is GC better for performance and EDGE better for longevity? Or is it the other way around?

 

[d00df00d]

Originally Posted By: jtaylor
So what's better for what. Is GC better for performance and EDGE better for longevity? Or is it the other way around?

If your engine is designed for the specs that Edge 10w-30 carries, Edge 10w-30 will perform better. If your car is designed for the specs that GC carries, GC will perform better.

If you use GC in an engine that would prefer Edge 10w-30, it'll waste fuel and provide no real benefit. If you use Edge 10w-30 in an engine that would prefer GC, it might be too thin and cause excess wear. This is largely because GC is quite thick for an xw-30, whereas Edge 10w-30 is designed to be an energy conserving oil.

"Longevity" probably depends more on the car than the oil in this comparison.

 

[Craig in Canada]

Originally Posted By: d00df00d
Originally Posted By: jtaylor
So what's better for what. Is GC better for performance and EDGE better for longevity? Or is it the other way around?

If your engine is designed for the specs that Edge 10w-30 carries, Edge 10w-30 will perform better. If your car is designed for the specs that GC carries, GC will perform better.

If you use GC in an engine that would prefer Edge 10w-30, it'll waste fuel and provide no real benefit. If you use Edge 10w-30 in an engine that would prefer GC, it might be too thin and cause excess wear. This is largely because GC is quite thick for an xw-30, whereas Edge 10w-30 is designed to be an energy conserving oil.

"Longevity" probably depends more on the car than the oil in this comparison.


I throw my support behind this summary - well put.

Different oils, different targets, they cannot be simply compared apples-to-apples.

The European Edge formulas which are offered with properties more like GC are marketed as newer than GC (Edge vs. Syntec/SLX/whatever) but I don't know if anyone has proven that Euro Edge is any better at what it does than GC is. Heck, I think there are many that feel that GC *is* Euro Edge.

 

[INDYMAC]

I have used GC in my S2000 (F22C) with mediocre results compared to PP 10W-30 (EOP) and ML Synthetic 10W-30 (SL). I have not tried the EDGE 10W-30, but would before the GC based on my experience. I'm trying a batch of LE 8130 10W-30 now. I'll probably test it after the second fill.

 

[Steve S]

Originally Posted By: CATERHAM
Originally Posted By: JSRT4
nice report there audi junkie. Looks good. I really don't need to debate the 5w30 vs. 10w30 choice as the car will be put to sleep well before freezing temps and when it wakes up in April it will be well above freezing. Operating temps would be between 10 degrees celsius and 30 degrees celsius in the 3 seasons that that car will be used.


The main advantage of the 5W-30 vs 10W-30 has to do with it's higher viscosity index; 170 vs only 148 for the 10W-30 grade. With the better syn oils the 10W-30 grade is virtually obsolete in that it has no longer has any advantages over it's 5W-30 stable mate. Particularly in a high reving sportscar, the lower the start-up viscosity even at warm temp's the better.
That means you can rev the engine higher when cold and during the warming-up period before the oil pump goes into by-pass.
That's the reason I run a light 20wt oil in my Caterham. Even with such a light oil and very high VI oil it will still take at least 20 minutes for the oil to build up sufficient heat (thinning out) so that I can use maximum rev's without going the oil pump going into bypass.
It's the same reason Dr, A.E. Haas runs a 0W-20 and 0W-30 in his exotic sportscars and he lives in central Florida.

It's one of the reasons I like M1's resently reformulated AFE 0W-30; it's VI is 180.
I run 15w-40 in my boat engines that turn 7,500 RPM and upon teardown have never noticed any problems as mentioned by AE HASS upon tear down inspection. usually the ugly parts would be the valve spring ,retainers rocker arms etc. due to the high spring pressures. The rod and crank bearings would look picture perfect though used. Usually all things equal on a finished motor oil the higher VI means more viscosity improvers which leads to less film strength / more shear in the higher loaded areas.