A few weeks ago i asked about oil for a rebuilt 454 motorhome engine.
A few days ago i found 3 quarts of 10w30 gtx hidden in the waste hose compartment.
I called my friend and asked him if he was was running 10w30 or 1540 in the rv and he said ( the white bottles of castrol )
So when we drove the rv home, it was 117°f and 1.5 quarts low. After the hour long stop n go drive, the oil psi ( 1983 dummy dash guage ) was roughly 40 psi.
Cold, its 55/60.(cold latley has been 100°f @ midnight )
Should i stay with the 10w30? Or refill with 15w40 next service?
A few days ago i found 3 quarts of 10w30 gtx hidden in the waste hose compartment.
I called my friend and asked him if he was was running 10w30 or 1540 in the rv and he said ( the white bottles of castrol )
So when we drove the rv home, it was 117°f and 1.5 quarts low. After the hour long stop n go drive, the oil psi ( 1983 dummy dash guage ) was roughly 40 psi.
Cold, its 55/60.(cold latley has been 100°f @ midnight )
Should i stay with the 10w30? Or refill with 15w40 next service?