hi there i have 1991 daihatsu frezoa 4x4
have put on a oil cooler have had it on for a little while coming off the baech in soft sand at a modrate speed , the other day .and could smell oil l bruning so i pull out the dipstick to see that the oil was smoking and was only half full which alwasy full, what would cause that to happen i have penllie oil full symcit 10 ,40 racing oil in it can you help thanks