Would you use Liqui Moly Pro-Line Engine Flush on a 13yr with 120k Mazda?

Maintenance/Repairs
1

Mazda 5 - does 2x6k commute lately - previously all freeway miles.

I use Mobil 1 and Wix filter - change yearly. Once sent it to lab after about 15months of use - Blackstone recommended extending the interval - but I am doing yearly, 4k.

Since the last oil change, 1k, oil is relatively dark compared to Volt or 2017 Prius with 40k.

So thinking of using it in my next oil change:

  • add the Flush and run for 20min on the existing oil
  • put some cheap engine oil (use the same filter?) and drain it again after 10min of idling
  • chnage filter and put Mobil 1

What do u guys think?
Saw some old threads - older than my car though:

https://community.cartalk.com/t/is-engine-flushing-effective/756/9

https://community.cartalk.com/t/engine-oil-flush/17544/10

2

Simply unnecessary.

1 Like
3

Take of the valve cover. Top of head clean? No sludge? Flush is not needed. Or, remove oil fill cap and look inside.

4

I would just add Sea Foam each oil change.

Tester

5

Thanks @Tester {you saved me a few tires last time by giving me a link for my Prius!}

So add 5 Oz of Seaform to the Crankcase - car takes 5qts of oil?

It seems I could also add it to gas tank, simultaneously - identical cans?

Seaform seems simpler process than Liqui Moly (perhaps this is a bit heavy duty and needed for engines that is clogged up bad).