Coolant leak

2000 Tacoma prerunner, 375,000 miles. Runs perfect, just old. I change oil every 5 k, Mobil 1 5w30. 1/2 qt down at 5k. No leaks. My question is: Blackstone Labs did oil analysis. Said has coolant leak into oil.determined by potassium 28 and sodium 204.
No recommendation.i bought truck with 370k on and I am 4th owner. Should I worry or keep driving? Thanks to all you experts and Merry Christmas to all

 

Are you topping off coolant reservoir every 5k miles?

 

Haven’t in past, but on my list now. Thanks for reminding me. Merry Christmas!

 

I guess my question is, if you haven’t noticed the coolant level dropping, I would continue using the truck as is. But if you’re topping off because the reservoir is empty, you might have a cracked block, bad head gasket, cracked head or all 3.

 

Yes, I see where you’re coming from. I’ll keep an eye on it. Again, my thanks

 

Anyone have recommendations for head gasket kit for my 2000 2.7. I suspect I’ll need one soon. I’ve seen them online from 49.00 to 149.00

 

This is the set you want......but you can shop around and find it almost $100 cheaper
Gasket Set - Toyota 4Runner, Tacoma 2.7L 3RZ-FE (2000-2004) Genuine Head Gasket Set 04112-75190

Head Gasket- Toyota 4Runner, T100, Tacoma 2.7L 3RZ-FE & 2.4L 2RZ-FE OEM Head Gasket (1995-2004) 11115-75031

 

Wow, truck didn’t cost much more !! Thanks!