Date registered: Jan 2009
Vehicle: 1977 230, 1990 300E 2.6
Location: Eastern Panhandle, WV
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I heartily recommend diesel formulated oil for your older engine. You can purchase any of the name brand standard oils (non-detergent) in in the usual 15W40 almost anywhere. Don't be confused by the "Diesel" rating. These oils have been recommended by Mercedes for their older gas engines. The 15W40 oil is not listed in the manual that came with my '77 230 but it is listed in the MB comprehensive engine service manual. The oils are often described as being suitable for hard working Euro. gas engines. I use 15W40 in both of my gassers. Currently use Valvoline Blue. Since you live in a warm climate, this viscosity will be perfect for your engine and the anti-wear additive will protect your engine better than current low-pollution modern gas engine oils.