10W30 / straight 30 / lawnmower
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Triple_Se7en
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Difference is viscosity at running temperature.
I quit using straight 30W about 3-4 years ago. Now I run Shell 5W-40 Rotella or Mobil 1 5W-40 Delvac. You live in a similar climate as mine. You will notice a nice difference when pulling that chord to fire it up - nice difference in OCIs.
I quit using straight 30W about 3-4 years ago. Now I run Shell 5W-40 Rotella or Mobil 1 5W-40 Delvac. You live in a similar climate as mine. You will notice a nice difference when pulling that chord to fire it up - nice difference in OCIs.
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From what I understand, it's acceptable to do that, with the understanding that consumption is likely to be higher while using 10w30.
Briggs & Stratton's #1 choice in motor oil is synthetic 5W30, which they sell under their own brand name. They also sell and recommend straight 30 weight for use above 40 degrees. They recommend 5W30 synthetic from -20 degrees to +120 degrees. They go on to say that dino multigrade oils may cause consumption if used above 80 degrees.
Their 5W30 synthetic is not the new API SM grade. I have been using Mobil 1 5W30 in my Honda engined mower since I bought it back in 2000. I used the last of my old stock Mobil 1 which was not SM this year. I have bought a supply of Mobil 1 High Mileage 10W30, which is SL, and not SM rated. Inasmuch as Honda calls for any kind of 10W30 motor oil, my mower should like it just fine.
Their 5W30 synthetic is not the new API SM grade. I have been using Mobil 1 5W30 in my Honda engined mower since I bought it back in 2000. I used the last of my old stock Mobil 1 which was not SM this year. I have bought a supply of Mobil 1 High Mileage 10W30, which is SL, and not SM rated. Inasmuch as Honda calls for any kind of 10W30 motor oil, my mower should like it just fine.
If it is a tired ol' simple motor it will smoke a little more at start up when using 10w30...but it will run, and cut grass...
I was thinking about using Shell Rotella 5W-40 in our lawnmower, but I am holding back because I wasn't sure if it would be good or bad. Our mower is a Honda that is only a couple of years old. The manual calls for a 10w30 oil. Would Shell Rotella 5W-40 be a good oil to use? Is it too thick?
I've been running Mobil 1 15w-50 and some left over Napa Synthetic 15w-50 I've had on hand. However . . . I will be switching to Rotella T Synthetic 5w40 in my Troy-bilt Rototiller, Toro mower. I already run it in 2 of my Toyotas and motorcycle. Makes sense to run it in most everything.
Rotella T Synthetic 5w40 represent a sweet spot of value and performance. However *note* that I'm not a fan of greatly extended drain intervals on mowers with out oil filters. The greatest risk of contamination is checking the oil level and crud falling in the hole.
Rotella T Synthetic 5w40 represent a sweet spot of value and performance. However *note* that I'm not a fan of greatly extended drain intervals on mowers with out oil filters. The greatest risk of contamination is checking the oil level and crud falling in the hole.
Triple_Se7en
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I use the 5W-40 Rotella in my two year-old Honda 6.5hp OHV push mower engine. I change it ever two years. Small area to cut -- just a standard big city lot.
10w-30 base oil is a little thinner. It could thin down to 20 weight for improved fuel economy. Look for a High Mileage motor oil that's not certified GF-4 for a 10w30 that will stay in grade. Or, upgrade to synthetic HM 10w30.
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