engine oil change at 5k interval - ClubLexus - Lexus Forum Discussion


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engine oil change at 5k interval

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Old 07-14-17, 04:45 AM   #1
texas008
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Default engine oil change at 5k interval

just performed oil change around 5k after dealer's oil change, using 0w20 fully synthetic
the old black engine oil looks pretty bad,
will probably continue with the 5k OCI.
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Old 07-14-17, 04:58 AM   #2
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Ok. Very conservative approach.
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Old 07-14-17, 10:12 AM   #3
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Yeah I think 5K is very conservative. If I don't do 10k on the GX I probably stick with 7.5K or so. Good compromise. I've been doing 7K+ for most of my cars now.
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Old 07-14-17, 11:07 AM   #4
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Without sending it to a lab like Blackstone it is hard to tell what is the condition of the drained oil. Just because it's black it does not mean it's bad. If you put a drop on a piece of paper towel it is easier to guess if it is good or bad.

Also the condition of the oil largely depends on how and under what circumstances the car was driven. Short distances in extreme hot or cold calls for more frequent changes than driving long distances on highways. Our GX is driven infrequently at the moment, sometimes stays in the garage for a week or more so its oil is changed once a year. On my other vehicles driven daily I change it every 12 months or if I hit the 5-6k miles mark whichever comes 1st.

The bottom line is: IMHO changing the oil below the 5 k miles mark is a waste of money unless it's been a year old and the truck was driven daily.
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Old 07-14-17, 12:57 PM   #5
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I try to change yearly with my Amsoil in all cars. This usually puts me in the 7500-10k mile range.

That being said no idea what oil dealer put in my GX so will change it at 5K miles in probably a month. Oil is still really clean looking at 4K miles.
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Old 07-14-17, 07:44 PM   #6
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Quote:
Originally Posted by texas008 View Post
just performed oil change around 5k after dealer's oil change, using 0w20 fully synthetic
the old black engine oil looks pretty bad,
will probably continue with the 5k OCI.
Just curious, if the service booklet says to change it every 10k/miles (unless extreme conditions) why would you change it sooner? My thought is if it's good enough to warranty by the Manufacturer that should be good enough for me. Not trying to entice a riot, but wouldn't that be like replacing your tires when only half their life has been used (or air filter, etc.)?
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Old 07-15-17, 04:10 AM   #7
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Quote:
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Just curious, if the service booklet says to change it every 10k/miles (unless extreme conditions) why would you change it sooner? My thought is if it's good enough to warranty by the Manufacturer that should be good enough for me. Not trying to entice a riot, but wouldn't that be like replacing your tires when only half their life has been used (or air filter, etc.)?
I agree. Unless you are putting your GX through some rigorous conditions (towing, dust, severe duty) I would stick with what the manufacturer recommends.
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Old 07-17-17, 04:26 AM   #8
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guess i just feel bored and want to get the feel of the first time DIY changing the oil on GX460.
the whole DIY process is not much more difficult than the LS460.
the hardest part is removing/replacing the skid plate.
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Old 07-17-17, 09:39 AM   #9
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Quote:
Originally Posted by texas008 View Post
guess i just feel bored and want to get the feel of the first time DIY changing the oil on GX460.
the whole DIY process is not much more difficult than the LS460.
the hardest part is removing/replacing the skid plate.
When the 10,000 mile oil change interval was first introduced, I was skeptical and kept doing my own oil changes around 5,000-7,500 miles. Now I go the full 10,000 and have not looked back.
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Old 07-17-17, 01:50 PM   #10
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The quality of the oil used is everything. If you buy cheap oil, change it often. A "synthetic" motor oil can have several different base oils. Some are not any better than a good mineral oil. PAO is one that is no better than a good mineral oil. The original Mobil1 was ester based and the 15,000 mile Mobil 1 is similar. I run the 15,000 mile 0-20w Mobil1 and change it between 10,000-15,000 miles depending on the time of year. Summer less miles due to the heat. Winter, isn't as hard on the oil.
2 reasons to change oil: oxidation and dirt. Black oil is oxidized and contaminated with carbon. The darker it is the sooner it needs to be changed.
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Old 07-17-17, 07:22 PM   #11
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Quote:
Originally Posted by texas008 View Post
just performed oil change around 5k after dealer's oil change, using 0w20 fully synthetic
the old black engine oil looks pretty bad,
will probably continue with the 5k OCI.
Was 8.2 quarts as stated in manual fairly accurate with filter swap?

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Old 07-17-17, 10:10 PM   #12
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Quote:
Originally Posted by blutopless View Post
The quality of the oil used is everything. If you buy cheap oil, change it often. A "synthetic" motor oil can have several different base oils. Some are not any better than a good mineral oil. PAO is one that is no better than a good mineral oil. The original Mobil1 was ester based and the 15,000 mile Mobil 1 is similar. I run the 15,000 mile 0-20w Mobil1 and change it between 10,000-15,000 miles depending on the time of year. Summer less miles due to the heat. Winter, isn't as hard on the oil.
2 reasons to change oil: oxidation and dirt. Black oil is oxidized and contaminated with carbon. The darker it is the sooner it needs to be changed.
What about fuel dilution, acid and contamination? I rarely see oils that are oxidized beyond use. These GX's pee fuel into the crank case from what I've been able to see. I have found the opposite with winter leading to higher fuel % in my experience. Although I suppose one could argue more driver's idle their vehicles.
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Old 07-18-17, 05:43 AM   #13
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yes 8.2 QT is pretty accurate. I put in 7.8QT first and then after a few trips recheck and fill it up.

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Was 8.2 quarts as stated in manual fairly accurate with filter swap?

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Old 07-18-17, 05:46 AM   #14
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engine oil i use are either Mobile 1 0w20 or Penzoil 0w20, they run rebates every year and costs about $12 per 5QT jug after rebate.
may also try Castrol 0w20 later.
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Old 07-18-17, 02:05 PM   #15
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Consider the Mobil 1 Extended Performance at a minimum, performs much better than the standard M1.
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