Fresh oil change, 1000 miles and low oil level light already?

[stocker]

I only have a couple small things to add. With 90k miles I do not think your engine should be burning this much oil due to "wear". I think something else is going on - 1 quart in 3,000 miles would be more normal.

Can you say for sure if this is the first time you've had so much oil loss? I'm just throwing out that you could change your PCV valve since they are only like $5. I don't recall why, but I think I remember reading this can relate to oil loss/burn.

I was going to say if this is your first synthetic oil change, switch back to conventional you said it has always been on synthetic ... :th_scratchhead:

 

[Russosaur]

I agree with stocker, unless the car was running synthetic before change back over.

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[EB0286]

As far as I know the car was always run with synthetic, or I was told. Assuming that it WASN'T, can anyone elaborate on "switching back" to regular motor oil?

 

[Russosaur]

Drain synthetic oil, refill with conventional with new filter or at least I would put a new filter on. I would look it up but something about synthetic just being different and can leak from places it wouldn't normally. Or I'm completely wrong

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[Scottydoggs]

if its eating that much oil stop paying for synthetic oil, maybe use some 10 w40 see if it eats it too.

pcv should be checked if it has not been.

ever use seafoam? maybe give that a shot, just maybe the oil rings are caked shut and causing the consumption.

 

[Fivefingerdeathpunch]

Just switch, aint nothing special about changing oils.

Shoot, I mix and match oils all the time, even at work sometimes lol. If I run out of 5w30, just mix in some 5w20 and it's all good in the hood.

 

[FriboRage]

It always gets me when my customers freak about whether oils are synthetic or not, and all the conspiracy theories about synthetic oils ruining motors. They're totally compatible with conventional.

This idea that you cant switch back and forth is just nonsense, and the idea that synthetics cause leaks is misguided.

Synthetics are just really really good at cleaning, so when you take a higher mileage motor that's been run on conventional all it's life with medium to long oil change intervals, you have gunk that's built up in place of gaskets that have worn away. What happens when you add the super-cleany synthetic? It washes all that gunk out and cleans everything up, now there's no more gunk plugging up those cracks in the gaskets from the inside. They also tend to be easier flowing than conventionals, so there's that too.

 

[BillBoost37]

Well said.

 

[Bronco Boy]

It always gets me when my customers freak about whether oils are synthetic or not, and all the conspiracy theories about synthetic oils ruining motors.

Synthetics are just really really good at cleaning, so when you take a higher mileage motor that's been run on conventional all it's life with medium to long oil change intervals, you have gunk that's built up in place of gaskets that have worn away. What happens when you add the super-cleany synthetic? It washes all that gunk out and cleans everything up, now there's no more gunk plugging up those cracks in the gaskets from the inside.

So if the synthetic didn't cause the leaks, what did? :th_winking:

I never recommend synthetics or cleaners on hi-er mileage engines. The outcome can be good, but most of the time it is horrible.