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#4462411 - 07/18/17 12:41 AM Synthetic 10W40 vs Mineral 15W40 (Both HDEO)
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
Hi guys! Will a synthetic 10W40 HDEO (Shell Rimula R6M/R6LM) with a viscosity index of 153 be more shear stable than the mineral 15w40 counterpart (Shell Rimula R4X) with a viscosity index of 139?

Are there any other benefits of running the synthetic version other than cold start, resistance to thinning at higher temps, and longer drain intervals? (Ambient temps ranges from 26-33 celcius/80-95 fahrenheit, summer all the time)

Lastly, which one of the oils do you think is better for lots of stop/go riding? There are lots of traffic lights (80-90% City), will synthetics last longer/protect better than minerals for these conditions? Or will it be better to use mineral and change it more frequently?

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#4462413 - 07/18/17 12:50 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
Kamele0N Offline


Registered: 02/09/15
Posts: 2045
Loc: Slovenia
For stop&go definitely synthetic... Especially if you have turbo!
_________________________
2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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#4462414 - 07/18/17 12:51 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
4WD Offline


Registered: 09/21/10
Posts: 6411
Loc: Texas
What is engine?

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#4462493 - 07/18/17 06:33 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2384
Loc: Balearic Islands , Spain
Is this a motorcycle?
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4462567 - 07/18/17 08:09 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
alarmguy Offline


Registered: 07/10/12
Posts: 2152
Loc: South Carolina
I would use 15/40 if your concerned about shearing and simply change at the recommended intervals.

You dont have cold weather in Singapore but if you did ride in 40 F degree weather then maybe I would choose a 10/40 for that time of year only.
_________________________
14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50

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#4462581 - 07/18/17 08:25 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
My bad forgot to mention that it is a motorcycle. Is the mineral version good enough to protect during harsh usage and high heat? The people I know that use HDEO generally use their bikes strictly as commuters, dont know firsthand anybody yet that rides hard using HDEO.

By the way, is it accurate to use shift feel to estimate the viscosity of the oil? I heard that if the shifting becomes hard or difficult to find neutral, the oil is broken down or something


Edited by Brandonysz (07/18/17 08:34 AM)

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#4462595 - 07/18/17 08:39 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11970
Loc: N.H, U.S.A.
Marine 25w40.
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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#4464573 - 07/20/17 06:10 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: ARCOgraphite]
alex_at Offline


Registered: 05/31/16
Posts: 118
Loc: Vienna, Austria
Originally Posted By: ARCOgraphite
Marine 25w40.


Never heard that recommendation before, which Marine 25W40?

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#4464817 - 07/20/17 11:41 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: alex_at]
rrounds Offline


Registered: 07/05/07
Posts: 950
Loc: SACRAMENTO, CA
Originally Posted By: alex_at
Originally Posted By: ARCOgraphite
Marine 25w40.


Never heard that recommendation before, which Marine 25W40?

Here is some to choose from
25/40 oil

Rod
_________________________
'06 S2000
'00 SSEi sold at 252k miles
'08 Ford F53 V10
'13 Jeep Sahara 2 door

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#4465673 - 07/21/17 12:32 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
Thanks for the input guys! Much appreciated! laugh

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#4465917 - 07/21/17 09:12 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: South Florida
Originally Posted By: Brandonysz
Hi guys! Will a synthetic 10W40 HDEO (Shell Rimula R6M/R6LM) with a viscosity index of 153 be more shear stable than the mineral 15w40 counterpart (Shell Rimula R4X) with a viscosity index of 139?


Shell Rimula R6M and Rimula R4X both carry the JASO rating for wet clutch motorcycles. Both are fine. I wouldn't worry about finding a thicker 20W40 or 25W40 marine oil, especially considering a marine oil is probably loaded with MOLY which is not good for a motorcycle clutch. I'd use the Rimula R4x myself and just change the oil every 2k to 3K miles or earlier if the shifting starts deteriorating.
_________________________
17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30



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#4491390 - 08/17/17 07:53 PM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: bubbatime]
ozdrrider Offline


Registered: 08/10/17
Posts: 27
Loc: South Oz, Australia
Originally Posted By: bubbatime
Originally Posted By: Brandonysz
Hi guys! Will a synthetic 10W40 HDEO (Shell Rimula R6M/R6LM) with a viscosity index of 153 be more shear stable than the mineral 15w40 counterpart (Shell Rimula R4X) with a viscosity index of 139?


Shell Rimula R6M and Rimula R4X both carry the JASO rating for wet clutch motorcycles. Both are fine. I wouldn't worry about finding a thicker 20W40 or 25W40 marine oil, especially considering a marine oil is probably loaded with MOLY which is not good for a motorcycle clutch. I'd use the Rimula R4x myself and just change the oil every 2k to 3K miles or earlier if the shifting starts deteriorating.


G'day bubbatime. I have been reading on here for quite a while looking for a direct comparison of Rimula R4X to the the Rotella T4. I have assumed (which is always dangerous) that they are the same. Has anyone lab tested the R4X to show it's the same oil package as the T4? I am dropping off some oil samples to a Caterpillar service centre here in Oz and was going to get a VOA done....... but if I can save $40......
FYI The R4X will be going in the DR650.... picked up a heap @ <$5 a litre; will change often in the bike, as I tend to do... grin
_________________________
15 Pajero 3.2 Shell Rimula R4X 10w40 47K km
06 Suzuki Swift Sport 1.6L 5w30 Nulon full syn
17 Suzuki DR650: Trialing LUBEALLOY LA 35 ES
83 350 Chev powered Ski Boat: Nulon 15w40

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#4497065 - 08/24/17 02:47 PM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
alex_at Offline


Registered: 05/31/16
Posts: 118
Loc: Vienna, Austria
Shell Rimula R4X does carry a Jaso approval, but not Jaso MA as we motorcyclists need, it has JASO-DH1, which is a new Diesel engine standard!

Neither is it Allison approved ....

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#4503242 - 08/31/17 11:20 AM Re: Synthetic 10W40 vs Mineral 15W40 (Both HDEO) [Re: Brandonysz]
Brandonysz Offline


Registered: 11/11/16
Posts: 10
Loc: Singapore
The R4X has been tested on my aircooled 200cc bike, no problems with the clutch. Im curious whether the synthetic R6 provides better protection than the R4X.

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