{"id":4374,"date":"2025-06-12T13:23:27","date_gmt":"2025-06-12T13:23:27","guid":{"rendered":"https:\/\/normalab.com\/normes\/astm-d7688\/"},"modified":"2025-06-12T13:34:05","modified_gmt":"2025-06-12T13:34:05","slug":"astm-d7688","status":"publish","type":"normes","link":"https:\/\/normalab.com\/en\/standards\/astm\/astm-d7688\/","title":{"rendered":"ASTM D7688"},"content":{"rendered":"<p>This test method covers the evaluation of the lubricity of diesel fuels using a high-frequency reciprocating rig (HFRR). It is applicable to middle distillate fuel and other similar petroleum-based fuels which can be used in diesel engines. This test method also is applicable to biodiesel blends. B5 was included in the round robin program that determined the precision statement.<a class=\"partenaire\" href=\"https:\/\/normalab.com\/partenaires\/#pcs\">PCS<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Standard Test Method for Evaluating Lubricity of Diesel Fuels by the High-Frequency Reciprocating Rig (HFRR) by Visual Observation<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3231,"menu_order":0,"template":"","meta":{"_acf_changed":false},"groupe-norme":[105],"class_list":["post-4374","normes","type-normes","status-publish","hentry","groupe-norme-astm-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ASTM D7688 - Normalab<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/normalab.com\/en\/standards\/astm\/astm-d7688\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ASTM D7688 - 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