45 years of industry-leading technology  


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858-621-3201   Case Oil " Doing business with the best in business"  
Amsoil is perfect for turbocharged, direct-fuel injected vehicles
Providing protection against Low-Speed Pre-Ignition (LSPI).
----Formulated, blended & packaged -----
3 15 seconds or less to find the right products for your vehicle's (just click on the appropriate  image) 

​Next-Generation Diesel Protection for all truck owners
​Turbo or non-Turbo engines deserve superior protection!
​Mike Callahan  Servicing Independent AMSOIL Dealer   Since 1999  Business Location   San Diego, California ZO 510414
​Why pay retail when you can become a Preferred Customer and save up to 25% on all orders?
In The U.S.A.
As car enthusiast, we love our family and cars. We take pride in both and strive to provide each the best protection we can.
Case oil appreciates and is grateful to the continued business we have with our Preferred Customers, Commercial and Retail accounts.
Fast and timely deliveries are no problem with 11 national warehouses strategically located throughout the U.S.A.
Exceptional Wear Protection 
Amsoil Signature Series motor oil provides 75% more  engine protection against horsepower loss and wear
than required by a leading industry standard*

*Based on independent testing of Amsoil Signature 5w-30 in ASTM D7320, as required by API SN specification 
​On Dec. 1st, 2016 two new American Petroleum Institute (API) diesel oil specifications took effect, replacing the current API CJ-4 specification:
 
  •  API CK-4 (improved performance for current model-year and older engines)

  • API FA-4 (improved performance for model-year 2017 and newer engines only)​
Changes to diesel engine technology have resulted in:

  • New engine materials 
  • More HP & torque than ever
  • Hotter-running engines
  • Higher boost pressures
  • Acceptability of using up to B20 biodiesel 
Signature Series 5W-30 Synthetic Motor Oil protects
against harmful deposits on turbochargers 4X better than Mobil 1 Extended Performance* and 3.6X better than Royal Purple* in industry-standard testing*

According to experts, 38% of vehicles sold in north America will be turbocharged by 2019.
*Mobil 1 and Royal Purple are registered products


​Amsoil with it's Industry-leading technology gave me 138,000 extra miles!
California freeway driving "what fun" right! Not really especially when you lose the serpentine belt on yes my mini-van. Ok for those in the know my water pump, power steering, alternator and air conditioner also went non-operational. I am now driving a front wheel tank, good news I am only 9 miles from home (5 on the freeway 4 on a road with 4 stop lights) good news I only had to stop twice!

Ok why am I sharing this story with you? It's nearly 100 degrees and I decided to drive home and not stop on the freeway which meant I was now putting my Pontiac transport with 98,000 miles on it into what I would describe as an extreme driving condition, agree! 

Now I'm sweating both physically and mentally, why didn't I just pull over I have free towing? Well my first oil change after the first 3000 miles was, yes you guessed it Amsoil 0W-30 Signature Series first introduced to me by my neighbor Jim Signorelli a drag racer and desert aficionado. So since I kept up my oil changes, in my mind I thought "heck it's only 9 miles" forget the tow.

Well I decided to park the tank on the street which proved tougher than I thought since I had to make a turn to face it in front of my house downhill (oh did I mention the steam!) well the next day I replaced the water pump which caused the serpentine belt to break the belt and coolant now the big test, will it start (yay). 237,000 miles later I donated my mini-van to Father Joe's with the engine still running and the transmission working like the first day I drove it since I changed it to Amsoil ATF at 60,000. I'm looking forward to having you become a Preferred Customer and start protecting the vehicles your family drive while saving money in the process. I've trusted Amsoil since 1999 and look forward to becoming your servicing Amsoil dealer. Best, Mike with Case Oil 


This link has a 95 second video that will explain the Preferred Customer program and provide the answers you are looking for in order to make an informed decision.
Amsoil makes it fast and easy to save money.
​Law enforcement check out our firearm cleaner and lubricant 
​Commercial accounts and individuals use this free service to track maintenance