# Mixing oils in lawn tractor like a dummy **URL:** \ **Category:** General Discussion\ **Created:** [August 22, 2020, 10:57pm UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056 "2020-08-22T22:57:56Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![paulmurphy\_170180](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/paulmurphy_170180/32/22257_2.png) [@paulmurphy\_170180](https://community.cartalk.com/u/paulmurphy_170180)\ **Post date:** [August 22, 2020, 10:57pm UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/1 "2020-08-22T22:57:56Z")
Hello! It’s conceivable that I accidentally mixed sae 30 and 10w30 oil (1 qt each) in my 20 hp Koehler/craftsman lawn tractor today when I changed the oil. We can’t be sure since there were no witnesses. Should I wait until Monday when the wife goes to work and stealthily drain it and replace with 10w30 as God intended, or just let it ride? Thanks! ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [August 22, 2020, 11:29pm UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/2 "2020-08-22T23:29:01Z")
It won’t hurt a thing. Leave it alone and worry about other things. ---
**Author:** ![Triedaq](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Triedaq](https://community.cartalk.com/u/Triedaq)\ **Post date:** [August 23, 2020, 12:21am UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/3 "2020-08-23T00:21:22Z")
The manual for my 32 year old mower specifies 30 weight. In the last several years I have used full synthetic 10W-30. With air cooled engines used just in the summer as in a mower application, the mixture of 10W-30 and.straight 30 is fine. I have a generator that does have specific requirements for 5W-30 synthetic and I adhere to these specifications because I never know if I will need the generator in the dead of winter or after a power outage caused by wind or lightning in warmer months. However, I don’t have to mow in cold weather. ---
**Author:** ![paulmurphy\_170180](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/paulmurphy_170180/32/22257_2.png) [@paulmurphy\_170180](https://community.cartalk.com/u/paulmurphy_170180)\ **Post date:** [August 23, 2020, 1:19am UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/4 "2020-08-23T01:19:59Z")
Thanks! Mind you, I can worry about many things simultaneously. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [August 23, 2020, 1:43am UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/5 "2020-08-23T01:43:20Z")
I think most specified straight 30 in the summer and 10-30 or 5-30 in the winter. Briggs now says 5-30 synthetic is OK year round so that’s all I use anymore. So yeah, no problem. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [August 23, 2020, 2:02am UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/6 "2020-08-23T02:02:24Z")
As long as you don’t have a snowblower attatchment for your mower you will br fine. ---
**Author:** ![paulmurphy\_170180](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/paulmurphy_170180/32/22257_2.png) [@paulmurphy\_170180](https://community.cartalk.com/u/paulmurphy_170180)\ **Post date:** [August 23, 2020, 2:18pm UTC](https://community.cartalk.com/t/mixing-oils-in-lawn-tractor-like-a-dummy/169056/7 "2020-08-23T14:18:08Z")
Sadly I do use it to haul stuff around in winter. I’ll change the oil to 10w30 at the beginning of November. Thanks guys!