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Castrol or Mobil

8.9K views 29 replies 15 participants last post by  twinsisin  
#1 ·
I'm checking out oil brands: (both full synthetic)
Castrol Power 1 4T 10W-40 Superior Acceleration ( $ 11.99 - $ 13.99 each qt )
Mobil 1 Racing 4T 10W-40 ( $ 10.97 - $ 12.99 each qt )

As others have mentioned here on T-rat, I want quality for my nice new bike - price second.
Your opinions are greeted with enthusiasm :geek:
 
#3 · (Edited)
#10 ·
Same here, I’ve been using Mobil 1 syn in my 2017 Sportage turbo for 6 years. I used Rotella T6 in my ST1300 for 14 years and 77,000 miles.
Last night we (my wife) ordered a 6 pack of quarts, Castrol Power 1 4T 10w-40 synthetic from Amazon.
I have four auto stores near me, Advanced, Auto Zone, O’Rielly’s and Napa- only one of them had just 3 quarts of it.
 
#11 ·
Just FYI... my local O'Reilly Auto Parts doesn't stock the Castrol 10w50 4T oil but they seem to be able to get it in one day and they price match. They do stock the 10W40 Castrol 4T though.
 
#12 ·
I currently run the Shell Advance AX7 10w40 semi syn in my street scrambler which exceeds the manual spec, I wasn't keen on the castrol and the price seemed to he creeping up, also I've had issues with the bike so wanted to see if oil made a difference, it probably hasn't but the gear changes feel so smooth that I can hardly tell I've changed, where as with the castrol it (in my mind) felt more clunky, just my opinion though!
I also usually just go to my local halfords and pick up the champion oil filters (cof104), not had a problem with them!

I think the main thing is keeping on top of the interval of 10000 miles or every year!
 
#14 ·
This whole oil thing, Castro, Mobil One, Shell, Amsoil and others has been beat to death over many forums for years. Truth is if you use spec they all far exceed what’s required and needed. I used Mobil One prior because that’s what I preferred, but I will use Castro since that is what Triumph specs. If they spec Mobil One I would use it. I will definitely be using 10-50 in the summer months. JMHO
 
#15 · (Edited)
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"Precision testing and evaluation" :ROFLMAO:
That's why mine sat broken at the dealer for a month with less than 500 miles on it.

KTM does the same with Motorex. My KTM 690 SMC R had a Motorex sticker on its engine. Husqvarna 701's of the same vintage had BelRay stickers. SAME ENGINE. Mobil1, Motorex, or BelRay underbid Castrol when the contract expires next, and the Triumph manuals will all be rewritten for that model year.

Nothing wrong with Castrol at all, and if it makes you sleep restfully at night using it that is worth it in itself.
Just don't ignore that there is financial gain for both companies if we all keep buying it. The data sheets for Mobil1 4T and Power1 show they're nearly identical. With Mobil1 having a better pour point. But none of us are riding our machines at -48°C.

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I better switch to Progressive too!! :ROFLMAO:
 
#18 ·
The data sheets for Mobil1 4T and Power1 show they're nearly identical. With Mobil1 having a better pour point. But none of us are riding our machines at -48°C.
Motorcycle companies that mention a specific brand get a smoker deal on oil at the factories for pre-filling new bikes.
That's all there is to that. Might even be that one oil company is closer to the bike factory and shipping is cheaper.

I'm a big Mobil 1 fan and have used it for decades when Mobil offered the right product for the application.

The thing with Mobil is that they often don't. Thir Mobil 1 car oil doesn't meet some bike specs but it's cheap at Costco and Sam's Club.

Want a 10W50 4T for your bike? Sorry, Mobil only offers a 10W40 4T

Want a 20W50 motorcycle oil for you unit conduction bike? Sorry, Mobil only offers 20W50 -Twin oil but most V-Twins have separate trans and primary oil. That doesn't mean it won't work just that the oil doesn't meet spec for your bike.

Any oil from a major company that meets the weight and specs the vehicle manufacturer sets will be OK.

I avoid the designer oils that cost way too much.
 
#16 ·
Off topic slightly:
This oil talk reminds me of how much of a dirtbag company Polaris is.
I had a 2010 Victory - required "20w-40" oil and Victory (Polaris) touted all its mystical abilities and how it was specifically engineered for their magical air-cooled engines but had to be changed every 2500 miles. Good luck finding that weight anywhere that wasn't a Polaris dealership. At the time Spectro was the only other one offering such an odd weight looks like Amsoil is now also. Now it appears the Indian motorcycles are requiring "15w-60" or "20w-40". And still touting the magical abilities of this made up weight grade.

Triumph doesn't seem so bad with their nudging towards Castrol. At least it's in a "real" grade.
 
#23 ·
Mobil 1 V-Twin oil isn't rated by JASO standards. If it was, it would specify MA for shared crankcase/gearbox/clutch, MA1 for separate or even both.
  • JASO MA: This is the standard specification for oils that are used within one oil system (where the engine, gearbox and clutch use the same oil). These oils don’t contain any friction modifiers.
  • JASO MA1: This is a lower standard specification for motorcycles that require different oils for the engine, gearbox and clutch.
  • JASO MA2: This is a higher standard specification for modern motorcycles. These oils are suitable for use in motorcycles that have catalytic converters in the exhaust system.
  • JASO MB: This is a lower standard specification for scooter engines.
 
#28 · (Edited)
I do know more than the people who merely think they know more. I've used this for years with no problems in my Triumphs, my Harleys, my Hondas, my cars, my tractors, my Vespa, my dirt bikes, my lawn mower and my outboards. Don't use it on the sewing machine though. My wife, who's a bit anal like a lot of oil thread contributors, insists on genuine Singer spec oil for that. I daren't tell her I've been refilling her oil can with generic 3-in-One for years.

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#29 ·
I have 3200 miles on the odo and plan to change oil and filter at 4000. I’ll be using Mobil 1 Racing T 10w40 FS. I used it in all my previous bikes and they all shifted smoother and ran quieter than the oil recommended by their respective owner manuals. The Triumph owners manual lists 10W40 as being OK to use within the temperature range I ride in. I buy it through Amazon at $10.60 per quart for a 6-pack. BTW, I’ve used Mobil 1 FS in all my vehicles for years. Never experienced any problems.
 
#30 · (Edited)
Another vote for Mobil 1 Full Syn in all my 4 wheel vehicles for decades without a single problem.

For my bikes I'm more picky...

If 10W40 is right for your environment then you can't go wrong with Mobil 1 10W40 4T.

I need 10W50 where I live so I opt for the Castrol 10W50 4T Full Syn and my local O'Reilly Auto Parts gets it for me and matches the Amazon price.