I have been trying to find a heavier 20 grade since I drive in Louisiana heat one day and cold days in same week. I always ran 5w30 for everything but for warranty purpose I wanted to stay in 20 grade. From the viscosity number I get Synthetic is thinner so I did some math. 5 qts of 5w20 and 1 qt of 5w30 which pushes the Synthetic to same grade of 20 but heavy as conventional. Kills 2 things in I buy 5 qt jug of 5w20
for van and 5 qt jug of 5w30 for lawn equipment so no 1qt jugs. Best part of it all is if the dealership sends a sample out it will come back as 20 grade. Van runs nice and quiet on 20 grade and what I drive it will take 25 or so years to get to 200k. Anything wrong with the assumption? Both oil have same additive package
for van and 5 qt jug of 5w30 for lawn equipment so no 1qt jugs. Best part of it all is if the dealership sends a sample out it will come back as 20 grade. Van runs nice and quiet on 20 grade and what I drive it will take 25 or so years to get to 200k. Anything wrong with the assumption? Both oil have same additive package