Hey guys, 1st post, WOW (deep breath, here I go). I have a 1989 Toyota P/U, 22RE, 4cyl, 5-speed, 2wd, w/ 100k miles. I am in Los Angeles, drive 1k-2k miles per month, lots of stop/go driving. OCI is about 4k miles. Owners manual specs an SL oil w/ multi-grade viscosity's of 30 or 40 wts. Am currently using Havoline 10w-40 conventional,that I bought lots of when Big Lots and Rite Aid were liquidating for $1-$2 per quart. Filter is the oversize Purolator Pure-one PL30001. But running low now. Does this engine require an SL oil or would I be able to use an SM oil such as Chevron's or Havoline's conventional that has Moly for anti-wear additive. Even thought of using the Delo 400 15w40 CJ-4. I am a fan of the entire Chevron line but would consider other recommendations. I have about 9 cases of Chevron conventional in various weights (5w30,10w-30,20w-50)from Kragen mail-in rebates. Thanks in advance for your profesional input. Bill