Mixing mineral oil and synthetic oil

[ole man of the river]

I have 3 gallons of gas mixed with pennzoil mineral base tcw 3. And another 3 gallons of gas mixed with pennzoil synthetic tcw 3. They are both mixed at 50:1 ratio for my johnson 9.9.

Can I safely combine these two mixes into one tank for use, or could it damage my 2000 outboard?
Thanks.

 

[studlymandingo]

Re: Mixing mineral oil and synthetic oil

There is no issue with mixing the two types of oils.​

 

[ole man of the river]

Re: Mixing mineral oil and synthetic oil

Thanks, the synthetic oils are all new to me. And I didnt want to mess the engine up.

 

[Texasmark]

Re: Mixing mineral oil and synthetic oil

Some containers state they mix readily and if you see any "Synthetic Blend" oils they are just that.

HTH

Mark

 

[dajohnson53]

Re: Mixing mineral oil and synthetic oil

Is it not true that any oil (synthetic or mineral) that is rated tcw3 is fully compatable with any other oil with that rating?