Thanks Brian for the reply. Weather in Texas (Lufkin) 25 to 100 degree. Seller had only 5W-40. Would like to have 15W-40---Will 5W-40 be OK until next oil change?

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Thomas DuBose
DuBose Transmission & Automotive
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1981 300D 350k
1982 300TD 147k
1994 E320 117K
1967 SE Coupe