I want a Mobil 1 Oil cap for my wet sump engine
12-18-2015, 12:42 PM
#22
Le Mans Master
Hmm. The dealer is supposed to use Mobil 1 for all Vettes. Those that elect to use the least expensive dexos approved oil they buy in 55 gallon drums for the mechanic's helper in the oil change bay to pump with their measuring gun that they set for the capacity shown in the Owner's Manual chart (which for my Z51 is ~ 1/2 quart in excees and overfills) will probably just use it regardless what the cap says! 
12-18-2015, 02:42 PM
#23
Safety Car
If you really need Mobile One...
12-18-2015, 06:03 PM
#24
Safety Car
Amazon.com: ACDelco FC221 GM Original Equipment Mobil 1 5W30 Engine Oil Filler Cap: Automotive
If you really need Mobile One...
If you really need Mobile One...
12-19-2015, 01:44 PM
#25
Supporting Vendor
12-19-2015, 02:33 PM
#26
Safety Car
12-19-2015, 11:28 PM
#28
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
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When are folks going to learn .......... Dexos is not a brand of oil. It is simply a specification ! Go look at a bottle of Mobil 1, Castrol or, any of the other majors on the shelf at Advanced Auto, Auto Zone or Wally World. They all state that they meet or exceed the dexos specs.
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Steve_R (12-20-2015)
12-20-2015, 03:28 AM
#29
Pro
My service deal would not change Mobil 1 cause of the cap
No Sir-ee! It must say Mobil 1 on it or the service dealers will do whatever they want! Service manager at Weseloh in Carlsbad, CA argued with me that the oil change would be Dexos (compliant) just like the cap he said. I went home grabbed my laptop went back to show him the advise thread from the Corvette Forum. Then they called me back to inform me that they would indeed use Mobil 1, they checked on the Chevy service site. I doubt they used Mobil 1. I will change my own from now!
Last edited by Bunk; 12-20-2015 at 03:34 AM.
12-20-2015, 09:20 AM
#30
Drifting
Check for the oil part number on your paperwork and Google it. There are different PNs between the dexos1 spec GM 5w-30 and Mobil 1 5w-30.
And your story is one of many where it was "the cap rule", hence people wanting to buy it. I'd personally be concerned that an obviously aftermarket cap may draw attention to itself and have the exact OPPOSITE effect.
And your story is one of many where it was "the cap rule", hence people wanting to buy it. I'd personally be concerned that an obviously aftermarket cap may draw attention to itself and have the exact OPPOSITE effect.
Last edited by xp800; 12-20-2015 at 09:21 AM.
12-20-2015, 03:01 PM
#31
Race Director
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I did a lot of research about a year ago when GM said we should use Mobil 1 and dealers shouldn't up charge for it. I immediately found several that would fit my dry sump but failed to find anything for the wet sump. I do believe a wet sump cap and a "Mobil 1" dry sump cap could be cannibalized and epoxy glued back together to make one. I'm surprised that Sean from VetteFX hasn't produced a Mobil 1 decal to cover the "Dexos". To those who say you don't need it, the service guy will do the correct thing, you're probably right. I wanted one just like I wanted my Lloyd's mats.
edited to add for dry sumps: the FC215 has a blue seal just like the original cap. The FC221 is identical except it has a gray seal.
edited to add for dry sumps: the FC215 has a blue seal just like the original cap. The FC221 is identical except it has a gray seal.
Last edited by grandpawmoses; 12-20-2015 at 03:10 PM. Reason: added picture
12-20-2015, 03:09 PM
#32
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Sean would be violating trademark law as soon as he tried to sell it, he's gotten in trouble for that before....
Last edited by Glen e; 12-20-2015 at 03:09 PM.
12-20-2015, 03:12 PM
#33
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St. Jude Donor '12-'13-'14-'15-'16-'17
When are folks going to learn .......... Dexos is not a brand of oil. It is simply a specification ! Go look at a bottle of Mobil 1, Castrol or, any of the other majors on the shelf at Advanced Auto, Auto Zone or Wally World. They all state that they meet or exceed the dexos specs.
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Glen e (12-20-2015)
02-16-2016, 05:53 PM
#38
Drifting
what's the quantity of Corvettes produced with dry sumps vs. wet sumps. Wet sump Vettes 
02-16-2016, 06:11 PM
#39
Melting Slicks
And how much will they be?