I decided to finally clean the engine on my 98 MB C230 last Sunday. I mixed some greased lightning degreaser about 50/50 with water...sprayed down the eng and lightly agitataed with a soft paint brush. Let sit about 10 minutes and sprayed with cool water....light misting of 303 and after 5 mins a wipe with rag. Is there another product I can use that won't leave white deposits on the bare aluminum??...maybe a citrus based degreaser??