If thats a honda S-2000 your talking about. I ran GC in mine [7.5k oci] all summer and loved it, seem to run a little more smooth and less noisy. I may run it again this summer.
2007 Poll - Who's Running 10W-30?
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Patman
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I still maintain that it is though. Just because people are using it doesn't mean it shouldn't be phased out. People still follow the 3000 mile oil change, even though that's old school thinking, there is a perfect example right there.
Anyone using 10w30 could substitute 5w30 in it's place and get the same or better results, that's always been my point.
Oh wait, the phone is ringing, it's 1980 calling and they want their 10w30 back.
Yes, it's a Honda (2004). My only concern is that GC is headed for extinction, so why bother? I have 23 quarts left though!
I think the noise is still the same as it was with 5w-30.
Next oc I may use 5w-20 to see if it smooths out the slow(hot) idle vibration at all.
Next oc I may use 5w-20 to see if it smooths out the slow(hot) idle vibration at all.
From my experience and from what i've read and seen, i believe todays 5w30 to be far superior to the 5w30 of 10 years ago. However 10w30 does have its advantages in certain applications and the fact some cars owners manuals specificallly call for it are reason not to throw it out just yet.
My car makes a lot of valve train noise with any 5w30 other than motorcraft or castrol syntec blend. Both of those happen to be 5w30's that are on the thick side at operating temp (10.9 and 11.0 @ 100*C). In addition my car tends to burn approx 1/2 quart over the OCI with 5w30 and none with 10w30.
I'm not doubting the perfection of 5w30 in a great number of applications, but it does seem that in some applications it is valid.
Now if you were to suggest that high mileage 5w30 formulations could take the place of 10w30's, i might tend to agree. A high mileage 5w30 does in fact appear to be the best of both worlds.
03 Mitsu Eclipse Spyder Mobil 1 10w30
06 Infiniti G35 Amsoil ATM 10w30
06 Infiniti G35 Amsoil ATM 10w30
"However 10w30 does have its advantages in certain applications and the fact some cars owners manuals specificallly call for it are reason not to throw it out just yet."
In theory, isn't 10W-30 suppose to be more shear stable over time than 5W-30, simply because there is less VIIs? I noticed Amsoil's revised 30 SAE/10W-30 came out only a couple of years ago - must still be a demand for it. If I live where Patman lives, a 5W-30, or better a 0W-20, would be preferred; but if I live in Florida, I'd be much more concerned with the second number...
In theory, isn't 10W-30 suppose to be more shear stable over time than 5W-30, simply because there is less VIIs? I noticed Amsoil's revised 30 SAE/10W-30 came out only a couple of years ago - must still be a demand for it. If I live where Patman lives, a 5W-30, or better a 0W-20, would be preferred; but if I live in Florida, I'd be much more concerned with the second number...
Well I went ahead and dumped the 10w-30 at only 800 miles. Slow(hot)idle vibration and vt noise were getting worse so I changed to the recommended 5w-20. Motorcraft.
JHZR2
Staff member
94 toyota previa M1 10w-30 runs like new at 205k, and doesnt use or leak a drop.
JMH
JMH
Jorton; How is the 5w20 compared to the 10w30? Any difference in noise and/or vibration?
Maxlife 10w30 + VSOT must make a pretty thick mixture. I'm guessing a stout 10w40 at least, or perhaps a 20w40.
I'd be curious if adding something like VSOT to any oil raises the cold temp viscosity AND increases the hot temp viscosity. Think about the VII's going to work on the already super thick VSOT. If it were my car, i'd either run maxlife 10w40 or add the VSOT to regular (non HM) 5w30 if you are adding it for the purposes of additive reformulation instead of viscosity improvement.
Some engines are funny with regard to mileage.. My old VW 4 banger with SOHC and 8 valves got the same mileage no matter how i drove it, what oil i used, what gas i used. My current mazda V6 with DOHC and 24 valves seems to be much more prone to MPG variations depending on gas, oil viscosity, and driving habbits.
10w30 Havoline 1969 Ford F100 360
PP 10w-30 in an '02 530i, but only as an AutoRx rinse phase. Will switch to GC 0w-30 afterwards.
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