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> SOT: oil change interval, newer car with full synthetic
fixer34
post Sep 6 2024, 10:01 AM
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My wife's 2020 Mitsubishi SUV is coming up on 2 years since the last oil change. By the odometer, she has driven a little over 7000 miles. Car gets driven regularly, but short trips. Some 20-30 mins in length every couple weeks so we know the engine gets up to temperature. Oil is full synthetic.
Am I pushing the limits here (or over them), or get to the 2yr/8000 mile mark OK?

Just checked and the level is still over the Full line (they must have overfilled a bit..)
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Superhawk996
post Sep 6 2024, 03:17 PM
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I regularly do 7k between oil changes and don’t even give it a second thought. I run Mobil 1 in all my appliance vehicles.

The only thing that concerns me is the “granny cycle” short trips and the idea an occasional 20-30 min is a long enough trip to get it up to temp. Even when it’s up to temp, it takes time to evaporate out the condensation.

Short cycles are a severe duty cycle in most situations and you should be watching for signs of condensation and/or sludging. A whole lot less likely with synthetic.

Watch for whitish / milky / creamy /froth on bottom side of oil filler cap. Even better yet if you can see any of the valvetrain through the filler hole to verify it’s all clean looking in there.
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fixer34
post Sep 6 2024, 04:43 PM
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QUOTE(Superhawk996 @ Sep 6 2024, 04:17 PM) *

I regularly do 7k between oil changes and don’t even give it a second thought. I run Mobil 1 in all my appliance vehicles.

The only thing that concerns me is the “granny cycle” short trips and the idea an occasional 20-30 min is a long enough trip to get it up to temp. Even when it’s up to temp, it takes time to evaporate out the condensation.

Short cycles are a severe duty cycle in most situations and you should be watching for signs of condensation and/or sludging. A whole lot less likely with synthetic.

Watch for whitish / milky / creamy /froth on bottom side of oil filler cap. Even better yet if you can see any of the valvetrain through the filler hole to verify it’s all clean looking in there.

Not sure my wife would be happy with the "granny cycle" comment, although she wouldn't mind being a granny sometime soon...
Oil on the dipstick, oil cap, and what I can see of the valve train all look fine, nice and clean.
Thanks, I'll keep an eye on it but not worry.
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