bad if the engine oil not sythetic?? - Page 2
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This is a discussion on bad if the engine oil not sythetic?? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Originally Posted by Donkey Plus the fact that most group IV synthetic can easy handle 7,500-10K oil change intervals. i ...

  1. #16
    Registered User Scuba2708's Avatar
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    Quote Originally Posted by Donkey View Post
    Plus the fact that most group IV synthetic can easy handle 7,500-10K oil change intervals.
    i dont really like that considering all oil gets dirty just as quick whether its $20 per quart godness or $1.50 per gallon generic vegetable oil. dirt and the leftovers of combustion are the main reasons for changing oil. personally i use castrol edge and change it every 4000
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by Scuba2708 View Post
    i dont really like that considering all oil gets dirty just as quick whether its $20 per quart godness or $1.50 per gallon generic vegetable oil. dirt and the leftovers of combustion are the main reasons for changing oil. personally i use castrol edge and change it every 4000
    It's not a matter of like or dislike though. It's a matter of data. If an oil, any oil, still has adequate TBN and the detectable wear metals are low plus the free insoluble contaminants present are also low, both the oil and the filter are by definition suitable for continued use.

    I have used oil analysis data indicating my choice of oil could easily exceed 8,000 miles in my motor under my conditions of typical use.
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    Mace Windu devilfluff's Avatar
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    So long as you follow the manufacturer's requirements for oil, synth vs. dino is purely user preference.

    Just remember to properly judge you interval. Very few drivers in the US qualify for the "Standard" oil change interval. I'd recommend using the "Severe Use" interval.
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    Registered User Crb03's Avatar
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    Quote Originally Posted by brfatal View Post
    I prefer not using synthetic oil.
    +1 It burns to fast for my liking and the shop that build the engine said don't use synthetic. Tehy havn't steered me wrong yet...
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  6. #20
    Registered User etshulda's Avatar
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    I support oil threads. Just this morning I pondered my reoccurring fear; "What if the previous owner of my car used synthetic, and then I used the regular stuff, good god what if it's killing my whip!" Then I see another oil thread and it makes everything better.
    The fast and the "Yeah right!"
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  7. #21
    Moderator   Sasquatch's Avatar
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    Synthetic flows at cold temperatures better than dino oil.
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    Registered User wrx wagone's Avatar
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    Quote Originally Posted by 04.SPT.WRX View Post
    Synthetic flows at cold temperatures better than dino oil.
    Flow at colder temps has much more to do with the fluid's viscosity at that temp then whether is it synthetic or not.

    Now, you can purchase a 0W synthetic where I've only ever seen a 5W oil available in dino oil form. The 0W synth will flow better than the 5W dino, but again that is a function of the viscosity at the low temps rather than fact the oil is made from a synthetic base oil.
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  9. #23
    Moderator   Sasquatch's Avatar
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    My lawnmower demonstrates the difference. It will not start below 50 degrees or so with dino oil; with synthetic it will start fairly easily at temps well below that.

    The owner's manual for my snow thrower recommends synthetic below 32 degrees.
    Last edited by Sasquatch; 11-19-2009 at 02:45 PM.
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  10. #24
    Registered User wrx wagone's Avatar
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    Does it run a straight weight oil?
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  11. #25
    Moderator   Sasquatch's Avatar
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    Quote Originally Posted by wrx wagone View Post
    Does it run a straight weight oil?
    No. 5w-30 or 10w-30 are suggested for both the mower and thrower. I compared using 5w-30.
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  12. #26
    He simply abides. SD_GR's Avatar
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    That's interesting.

    Another synth-dyno tidbit: My lawnmower uses a Briggs & Stratton motor, and they recommend synthetic oil for the motor, saying that if synthetic is not used then oil consumption will increase. This is the opposite of what many users here report in their car motors.

    (I tend to use whatever in the mower if it's new oil and I'm not against using the old M1 5W-40 Turbodiesel/Truck synth straight out of my WRX if I'm in the mood to change the oil in both the car and the mower).
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  13. #27
    Moderator   Sasquatch's Avatar
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    Quote Originally Posted by SD_GR View Post
    Another synth-dyno tidbit: My lawnmower uses a Briggs & Stratton motor, and they recommend synthetic oil for the motor, saying that if synthetic is not used then oil consumption will increase. This is the opposite of what many users here report in their car motors.
    Briggs & Stratton on the snow thrower.

    Here is an extreme cold pour test - similar to an old TV commercial Mobil 1 used to run: YouTube - Mobil 1 TV Ep 1: Maximizing Cold Weather Engine Protection
    Last edited by Sasquatch; 11-19-2009 at 03:07 PM.
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  14. #28
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by 04.SPT.WRX View Post
    No. 5w-30 or 10w-30 are suggested for both the mower and thrower. I compared using 5w-30.
    Quote Originally Posted by SD_GR View Post
    That's interesting.
    Agreed. That doesn't make much sense from what I know about oil.
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  15. #29
    Moderator   Sasquatch's Avatar
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    This time of year I use the mower to help with leaf and yard cleanup. Several years ago when the mower was new it would not start at around 50. What gives? It was a one pull starter in warmer weather.

    I remembered the old Mobil 1 commercial. Figured I would give it a try in the Tecumseh powered Craftsman. Sure enough it started fairly easily, even down into the 30's. That sold me on the claim that synthetic flows better when cold.
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  16. #30
    Registered User Chrisfit's Avatar
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    Quote Originally Posted by brfatal View Post
    http://www.blackstone-labs.com/faq.php



    And problems tend to happen when I do use synth.
    Yeah, ive read that on their website before. Ordered a test kit, going to do it next oil change ~ 1000 mi.
    =)

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