excessive blow by?

[matt350]

I have a 99 Ford F350 with 166,000miles. Smoke "puffs" out of the oil filler tube. Is this normal . Truck seems to be running fine, plenty of power and boost and does not burn oil between changes. In a past forum someone said something about a blackstone Test? What is this and where do I have this done. Just want to make sure truck is alright before hooking up again to a 38ft toyhauler.

[vitalidle]

Blackstone laboratories will do and oil anylisis on a sample of your engine oil and give you info on wear and whether your intake filter is up to snuff etc. Ask for a sample bottle they send it free you send the sample in with I think its 22 bucks now and they will email you a report. Its well worth the money Here is a link to there website. Blackstone Laboratories