@Varmit, there is another post on here where a guy had a 402 and even after it was rebuilt it still consumed
oil way beyond normal limits and Roush replaced the whole thing at their expense with a 427R.... I am going to contact him to see who he spoke to! Mark at Roush told me to try Rotella-T 15w40. apparently (after doing some research on the net and with an engine shop) there is a special additive in it that counteracts the
oil burning.