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What kind of non-synthetic oil do you use?

Discussion in 'Car Forum' started by ClydeG19, Jun 3, 2005.

  1. ClydeG19


    Oct 5, 2001
    I've heard that Castrol is the purest oil out there from a friend of mine. He said he's disassembled engines that have used Havoline, Penzoil, Valvoline, and Quaker State for years and found a lot of parrafin buildup. He swears by Castrol because he's never had that happen with any cars that use it.

    Any similar experiences?
  2. streeter69

    streeter69 This is Kewl

    Nov 25, 2001
    I like annoying people.
    I used to use Castrol before I switched to syn oil. I never had a problem with it in my 12k rpm motorcycle or my street rods.

  3. Clydeglide


    Feb 9, 2004
    Tampa Bay
    Actually, yes. But Castrol was the culprit.

    I believe if you change your oil and filter on a regular and frequent basis you could buy the least expensive oil specified by your vehicle manufacturer without issue.

    I have worked in the car service business for over 20 years and the only oil related issues I could prove was lack of maintenance. Anything else would be anecdotal.

    I currently use synthetic with extended drain intervals in all my vehicles.

  4. walkin' trails

    walkin' trails

    Apr 24, 2005
    I used to run Mobile One Synthetic in my cars and still would, if I could find a reliable source for the 5W20 (I have an 03 Ford that requires it). I never had a problem with Mobile One. Back in the early '90s a Mustang magazine decided to test synthetic oils on the drag strip using one of the late model (early '90s) 5.0 Stangs. There were several companies making claims about their oils offering advantages in performance. The magazine testers observed that quarter mile times were actually a fraction quicker with Mobile One in the crankcase. The other oils did not show any measurable advantage. I don't remember how much quicker the car ran with Mobile One, but it was enough to get some drag racers excited. As I recall, they started adding Mobile One to their "tune up" protocol when testing new cars. If I can find the 5W20 is stocked at regular intervals at my local Walmart or autoparts store, I'll start using it again. Overall, regular oil changes at around 3,000 miles are still the best way to ensure that the motor stays together.
  5. chevrofreak

    chevrofreak Senior Member

    Dec 27, 2001
    Billings, Montana
    Castrol GTX is great stuff.
  6. Gary_P


    Jul 18, 2004
    Motorcraft 5W20 works fine in all my Ford's
  7. Rob1035

    Rob1035 Skeet Surfer

    Jan 24, 2005
    Charlotte NC

    ditto. no problems in my 100k bmw or my 9000rpm honda....not that thats definitive proof, but at least its not second hand 'net rubbish...
  8. vart


    Feb 17, 2000
    The Palouse
    I used to run Castrol GTX in all of my vehicles w/o any problems for years.
    Then, I switched to Mobil 1 and was very happy with the increased fuel mileage.

    However, with finances getting tighter and tighter, I just bought a 5-quart jug of Castrol GTX for $7.87 rather than cough up $25 for the Mobil 1. I put 7000 miles on my car every month, and oil changes have gotten expensive:( .
  9. GoGators

    GoGators Stomatologist

    Jan 25, 2001
    Louisville, KY
    Here's my theory: I change religiously every 3000-3500 miles. If my oil is approved by the API, shouldn't I be fine?
  10. Rob1035

    Rob1035 Skeet Surfer

    Jan 24, 2005
    Charlotte NC
    GoGater: indubitably. Unless that's a rhetorical question, in that case i retract my answer...:)
  11. chris93473


    Aug 21, 2002

    same here