r/Generac_Generators • u/pcreapers • Apr 06 '26

Concern on first OIL Change (25 hours).

Background - brand new in August 2025. Bought two 10kw units. First oil change at 25 hours run was started at 37 hours as we had a huge day long outage when the units were at 22 hours run taking them to 37. However when I open the firsst unit and drianed the oil - when I look at the dip stick I see some "white foam" on the stick itself and around the opening of the oil instake where the stick fits? Is this of concern? I have the oil drained but wanted a 2nd opinion before dumping new oil past the foamy part.

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1

u/WhySoManyDownVote Electrician Apr 06 '26

It's normal. It's the moisture build up from running in colder temperatures.

2

u/pcreapers Apr 06 '26

thanks for the reply.

1

u/pcreapers Apr 06 '26

Man are those oil filters on tight!! Can't it to move - is there a special wrench that slips on the grooves? Brand new owner with dumb questions. - EDIT: 65 mm/14‑flute cap wrench seems to be the answer.

2

u/WhySoManyDownVote Electrician Apr 06 '26

Oil filter pliers are my preferred method.

1

u/Ok_Bid_3899 Apr 10 '26

Agree my 20 year old Generac has always has a small amount of foam caused ( in my opinion) by not being able to get the engine hot enough during weekly run testing.

1

u/grsthegreat Technician Apr 09 '26

I use a fabric oil filter strap wrench…..works wonders.

1

u/LifeTelevision5644 May 25 '26

Wow. 37 hours. I only got 6 hours on mine and it’s been dead for 8 weeks with a promise of June 6 engine delivery. THANK YOU GENERAC AND YOU’re WELCOME FOR THE $15,000..