Switching to synthetics, looking for feedback

Discussion in 'General Chevy & GM Tech Questions' started by jbeall, Aug 21, 2009.

  1. jbeall

    jbeall Rockstar 100 Posts

    Hi All,

    I just recently got a 2003 Yukon XL. It's the most expensive vehicle I've ever owned, and we want this vehicle to last a long time. I'd much rather spend a little more on maintenance now, in return for having it running longer.

    One of the things that I'm planning on doing is switching to synthetics. The truck has 56,000 miles on it, we just got it this year, and while I can't say for sure, I'm going to assume it's always had petroleum based oils in it.

    I'm going to be switching to Amsoil unless I discover some new information that would suggest they are a bad way to go. I do have a few questions about switching, though.

    First off, I see that Amsoil sells an engine flush that is for use when switching to synthetics. For a vehicle like mine, with less than 60k miles, is engine flush something I should do, or should I just swap out to synthetic and not worry about flushing?

    I also have a question about using the engine flush. The instructions say:

    1) FLUSH: Change the oil filter and add the flush (about 10% of the oil capacity). Do not overfill the crankcase. Idle the engine 15 to 20 minutes, then immediately drain the old oil and flush.
    2) INSTALL: Remove the old oil filter and replace it with an AMSOIL Ea Oil Filter. Ea Oil Filters feature advanced full synthetic nanofiber technology, making them the highest efficiency filters that are available for the auto/light truck market.

    Ok, so it looks like I need a throwaway filter? Because the first thing you do is change the filter, then you change the filter again in step 2. I guess I should just go to Autozone and get the cheapest filter I can find?

    Second, I see that they offer a "bypass filter" setup. This gives you some additional filtration past what you get from your standard oil filter. I'm wondering if this is necessary for a truck that's not regularly used in "extreme" conditions (e.g., offroading, towing extremely heavy loads, etc.). While we may occasionally drive offroad, or we may occasionally pull a heavy load, it will not be the norm.

    But on the other hand, if it is really going to extend the life of my vehicle, it's worth it. I don't want to throw money away on something that's not giving me any real benefit, but I *do* want to do everything I can to take care of this vehicle, so we can have it for a long time.
  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    I have never been a big fan of flushes. I would change the oil and be on my way. If the oil is real dirty change it with a regular oil and cheap filter. Run it for a couple of days and then drain and add the good synthetic oil and filter.I'm sure the Amsoil dealer will chime in later and give you his views on flushing.
  3. retired

    retired Rockstar 100 Posts

    Flushing is not needed on a low mileage vehicle. Just change over to synthetic oil and change it every 5k.
  4. jbeall

    jbeall Rockstar 100 Posts

    5000 miles?

    Every 5000 miles? Amsoil says they can go 25,000 miles or 1 year, whichever comes first...???
  5. retired

    retired Rockstar 100 Posts

    I don't use Amsoil so I don't know there recommended oil change intervals, but I do use other brands and at 5k the oil is looking pretty dirty.
  6. jbeall

    jbeall Rockstar 100 Posts

    What brands do you use?
  7. Blownchevy05

    Blownchevy05 New Member

    amsoil is the way to go, i ve been using it for years, great reviews
  8. rmagni

    rmagni Rockstar

    I also only use Amsoil I just change it once a year have never had a problem
  9. jbeall

    jbeall Rockstar 100 Posts

    So I'm thinking about the flushing instructions again, and I'm wondering, how do you change the filter while the oil is still in the vehicle? Remember, it says you first change the filter, before you drain the oil.

    That sounds really messy. Isn't the oil going to come gushing out when you try and swap the filters?
  10. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    You can change the engine oil filter before or after you change the oil in the pan. It makes no difference at all. The oil in the engine is below the filter.

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