I thought I had 2-3 bottles of Opti 4 ( an expensive oil they reccomend with the Scag I bought last year). I just changed my oil and realized I only had about 1/2 a bottle of new oil, when it takes about 2 to fill up. My question is, will I be safe using 1/2 a bottle just 'til tommorow? When I changed the oil after about 70 hours today, it seems that just as much came out as what I put in 70 hours of use ago. So I'm thinking I'll be ok 'til tommorow. What do u guys say?